I got my Mac Pro on Friday at an Apple Store. Wound up buying the Logitech Wireless Desktop instead of the Apple BT m&kb. The reason is that they were going to charge me full price -- you only get the discount if you buy the machine online as a BTO, because then they take out the standard m&kb and substitute the BT.
BTW, got my Logitech m&kb for $46. The manager gave me a $50 discount on account of them sending me home with a box that had only the tower in it (some boob forgot to put back the accessory pack back in the box after they took it out to add memory and airport to my machine). Now here is the kicker. When I called the store after getting home, the girl genius told me "oh they come like this, without m&kb". I couldn't fn believe my ears!
How can you work for Apple and not to know basic stuff like this!
I got the manager on the phone and let him have it.
BTW, if you are considering going with BT, get yourself some rechargeable batteries, otherwise you'll buying new batteries every week.