yea, they didnt use dx9 in the ut2003 demo due to hardly anyone having it, but they might use it in the full version depending when the release date is
on NOLF2? erm, probably, im using a 1.67mhz cpu, so is not THAT much of a difference, and i can run 1600x1200 all high settings, and its still perfectly playable. although thats without fancy shit like FSAA or AF. although currently i use 1024x768 with Qunincux AA and 2x AF. im guessing u'll be able to use high settings fine, wats ur current cpu?
cpu with the ti series makes ALL the freak'n difference in speed, if you have like 800mhz with a gf4 ti whatever, then it'll run barely faster than a gf4mx, but thats obvious with the cpu speed anyway