CNET.com has published a compilation of cell phone radiation levels, as cited by the FCC.

The levels are expressed in  SAR, or Specific Absorption Rate. SAR is a way of measuring the quantity of radio frequency energy that passes through the body.

If a cell phone has rate higher than 1.6 watts per kilogram, it won't pass FCC muster.

The  Motorola Slvr L6 barely makes the grade at 1.58, watts per kilogram, the worst ranking.

The best ranking is Audiovox PPC66001, with only 0.12 WPG.

The three rated BlackBerrys came out in the middle of the pack.

BlackBerry 7100g was rated at 0.86. The BlackBerry 7250 and BlackBerry 7750 each scored 1.27.

We're resuming the daily countdown of the ten most viewed questions and answers on  the BlackBerry section of the technology advice site Experts-Exchange. I believe this a good place to gage what imponderables are on the minds of BlackBerry users.

Today, I will spotlight the fourth-most viewed BlackBerry-related question asked on Experts-Exchange:

The question is "resetting a power-on password BB 7750."

Found a 7750 BB in a pile of IT JUNK that I was given," Joe Cistaro writes. "Is there a way to remove the Power - on - password so I can see if service is on this thing? 

Joe notes that he even tried the "paper-clip in reset hole," but apparently without results.

But as he does so often on Experts-Exchange, the all-knowing JConchie comes up with a solution.

No, really.

Catherine Roseberry is About.com's Guide to Mobile Technology.

I've just stumbled across her review of the BlackBerry 7750, the device you see there on the right. Roseberry gives this BlackBerry four of five stars.

She likes the phone quality with no feedback or echoes, the clear display, the security password protection and the clip-on Headset's ease of use.

On the other hand, Roseberry gives a "raspberry" to the BlackBerry 7750's lack of a built-in SD Card/Multimedia Card, and to its modest 14 mb of memory.

Total Solution Technology has just released its ArmorPlus for BlackBerry line, a BlackBerry systems board hardware add-on with software capable of such applications as fingerprint capture, credit card processing and even some camera functionality.

Basic pricing is $395, with extra functionalities priced on an a la carte basis.

Currently, ArmorPlus is available for the BlackBerry 7730, 7750 and 7780.

On the Yahoo! BlackBerry Users Group, Member Larry posts a question about this new BlackBerry 7750 he's just bought on eBay.

Larry's contacted Verizon Wireless about a warranty, but he says that Verizon would bot insure an eBay purchase.

In Larry's opinion, he thinks this is "an illegal act by Verizon" to force buyers to purchase a BlackBerry from them.

C. Mark Wagner - one of the more active and expert participants in the Yahoo! BlackBerry Users Group - posts a reply that explains Verizon's policy accurately and concisely.

"You might have a case if you had bought the BB7750 from (BlackBerry-maker) RIM (Research In Motion) but you didn't," Mark writes. "Neither you nor Verizon know why the seller sold it through eBay but if I were Verizon's (warranty) issuer," I would be suspicious."

Mark adds that a key reason no warranty was issued because the device's sales channel (via eBay, not via Verizon-authorized channels) means the device has an unknown history.

"Caveat Emptor," writes Mark.

That means "buyer beware," and I agree.

On the Yahoo! BlackBerry Users Group, several users have been debating the memory and other performance factors of the BlackBerry 7750 OS 4.0.

"I have some enterprise business users who have 7750 devices that are currently on the 3.7 device OS," Joe writes. "We are migrating these users to the 4.0 BES and I also want to upgrade their device OS to the 4.0 platform as well."

He asks other Members for a memory comparision between the 4.0 and 3.7 OS.

"Based upon this I may opt to upgrade these users to the 7250 device which has more memory than the 7750 (32mb vs 16mb) and would give them Bluetooth capability," Joe adds. "These users can have hundreds if not thousands of contacts in their address book so memory is very important."

User C. Mark Wagner responded with a mixed, but specific verdict.

"I had no problem upgrading my Verizon BB 7750 to v 4.0," he writes. "The device was noticably slower -- but I did not find it intolerably so."

As to memory, Wagner writes that with just the RIM suite of applications, "free memory seemed to drop from about 2 MB to about 500KB but it worked fine."

The added factor here, at least for Wagner, was the fact that Version 4.0 will let you set up file compression. He writes this capability "helps a lot and allowed me add thrid-party apps and to run with under 100KB."

Still, Wagner finds it necessary to point out that on the BlackBerry 7750, his perception was that OS 4.0 seemed to provoke a memory leak. He solved that problem as well.

But, whenever memory was so low as to cause sluggish behavior," he writes, "a soft reset would free-up quite a bit. I would definitely suggest trying OS 4.0 on the Blackberry 7750) --at least to hold you over until you are ready to upgrade to the BB 7250."

Most cell carriers with BlackBerry data and voice plans now say they will either cut rates or be flexible on invoice payment for subscribers in areas affected by Hurricane Katrina.

Areas such as New Orleans, as shown in this photo by photographer Smiley Pool of the Associated Press.

Here's a rundown:

Cingular Wireless, which sells the BlackBerry 7100g and BlackBerry 7290 will give its New Orleans and Biloxi-area custmers a one-time 50 percent credit on their monthly fee. These customers will not be charged for roaming, extra minutes, long-distance or text messaging from late August up thru September 30.

Cingular subscribers in metro Mobile, Ala., Jackson, Miss, Baton Rouge nd Lafayette, La., will get a one-time 25 percent monthly fee credit, as well as unspecified discounts on roaming and text.

Verizon Wireless, which sells the BlackBerry 7250, says it will work on a case-by-case basis with customers in the region, and as Cingular is doing -temporarily will stop collections and disconnects due to non-pay.

SprintNextel, which sells the BlackBerry 7750 and BlackBerry 7520, says it will also suspend collection and termination actions in the region. The company will give a month of free wireless service to subscribers in hard-hit areas and would also offer free long-distance, roaming, text messaging and extra minutes to customers in areas hardest hit by Hurricane Katrina.

Ned Johnson and Martin Trautschold are consultants with more than eight years of combined experience working with BlackBerry using corporate and individual clients. Trautschold, in fact, has  presented at the Annual RIM BlackBerry Wireless Enterprise Symposium.

Now, Trautschold and Johnson have combined to write two BlackBerry Made Simple 150-plus page PDF formatted e-books for BlackBerry users.

BlackBerry Made Simple covers 6500, 6700, 7200, 7500, 7700 and 7100 series BlackBerrys.

BlackBerry Made Simple- The Definitive Guide for 7100 Series covers all BlackBerry 71xx models.

Both books are $19.95 apiece.

Ned Johnson and Martin Trautschold are consultants with more than eight years of combined experience working with BlackBerry using corporate and individual clients. Trautschold, in fact, has  presented at the Annual RIM BlackBerry Wireless Enterprise Symposium.

Now, Trautschold and Johnson have combined to write two BlackBerry Made Simple 150-plus page PDF formatted e-books for BlackBerry users.

BlackBerry Made Simple covers 6500, 6700, 7200, 7500, 7700 and 7100 series BlackBerrys.

BlackBerry Made Simple- The Definitive Guide for 7100 Series covers all BlackBerry 71xx models.

Both books are $19.95 apiece.