I'm pretty doubtful that it's going to be champagne or gold in colour. That would alienate a vast majority of BB users and would probably see a negative reaction from T-Mobile's user base. After all, someone in Bellevue must realize how many people want this handset...
However, if you look here:
http://i190.photobucket.com/albums/z...007/8320-1.jpg
... you'll see that the colour does in fact look gray. I have a funny feeling it's just horrible image compression playing tricks on us. Especially, if you compress and resize certain colours in a restricted palette, it tends to try and match it, and, et voila... ugly champagne. Gotta love PowerPoint.
It's all speculation, of course, until we see final proof from T-Mobile. But, this sort of "making a decision for me" mentality would push me to AT&T if the only available colour was champagne.
[Though, reading an additional post on BGR just now, it appears Pearl 1.0 is re-debuting(!?) in added colours. I'll hope they keep the colours on the Pearl and leave the 8800/8300 to us businessfolk.]