I got mine Friday morning but unfortunately havent had the opprotunity to do a full review.
Thing about drivers:
1) I looked at the date of the Beta and the WHQL drivers and the Beta ones were a month or so newer.
2) I remembered that somewhere on the forums people were told to use the non-WHQL drivers.
Thus, I installed the Beta drivers and they run fine. I dont notice any sort of desktop weirdness like what KarateKid referred to. Plus, although I have only run Sandra MAX3 so far, they appear to be doing their job as I played BF1942 w/ Road to Roam and Secret Weapons at 1600*1200*32bit Colour at everything maxed out (LAN party) without problems (I only noticed lagginess with the mouse on the pick-your-spawn-point screen).
EDIT: Another thing regarding drivers: A friend of mine (Syndicat3) who got his 5680 on Friday as well, just went on ATi's site and got the standard Catalyst drivers for XP (not mobile; if you click mobile, it will give you a page asking you to inquire with your manufacturer). Apparently it works fine. I would like to know the pros and cons of such actions.
Thing about the keyboard:
I noticed that its a bit wabbly on the right side; if you use the characters on the right side, the sound is louder than the rest of the keyboard. Also, if you tab the little placeholders around the arrow keys, you can actually see it move. Is this normal or should this be fixed by something like the fix for the 8890s?
Heh; come to think of it, I already have a mini-review with the above