Re: 10 days til the 7800!!!
Thing is, to get the most out of that card (£400) you'll have to buy the most powerful processor available (AMD X2- £700), 2gb of fast ram (£300), a new 600w psu (£60) and probably a new motherboard and some SERIOUS coolage (£200). So you're looking at at least £1500 to enjoy the benefits this card will bring, although remember there is no game currently available to test the 6800U, let alone the 7800.
BTW, I've heard the card has 24 pipelines and clock speeds 200mhz higher then the 6800U.
My build: Gigabyte GA-P35-S3||Intel Dual Core E2160 @3.2ghz||2gb PC2 6400 Geil||Gainward 8800gt||Maxtor 160gb + 80gb HD||LG DVD/RW||Arctic Cooler 7 Pro||450w XPower PSU||3d Mark 06 = 10760