It's a problem for me if I buy one for my office and it arrives as the revison B model and is not as functional as the two A models I already own.
Same question is still on the table: Does anyone who owns the B model know if the iPod, screen brightness and speaker keys function now with iOS 5?
I'll search around Apple's website to see if this has been resolved yet before I order.
This was a post on Apple support but some of the keys are not fuctional on the B over the A revision:
http://support.apple.com/kb/HT4773
This post was an alert by an Amazon purchaser of the B revision product:
Amazon Customer Review:
6 of 7 people found the following review helpful:
Function keys don't work on latest version for iPad, September 9, 2011
By*Sfguy
Amazon Verified Purchase(What's this?)
This review is from: Apple Wireless Keyboard (Personal Computers)
A word of caution! The function keys for the newest version just purchased from this site don't work with the ipad2. This apparently doesn't apply to earlier versions but it does to the ones they are currently selling. It appears to be a software problem with the model mc1844ll/b model. While trying to sort this out I went to the apple site and there is a long discussion string on this with a lot of frustration. There was speculation that a future software upgrade for the iPad may fix it but the apple folks apparently just said too bad, do you want a refund and won't explain even though their ads state that the function keys (brightness, volume, etc.) work with the iPad but they don't with the current recently released model. Two stars for it being nice looking and nice touch on the main keys but not four or five for not living up to advertisements and not testing this before releasing a new model.