Ripnet-uk.com have the low down on the leaked Unreal II-Alpha version. Here's a bite from their article:

Here are some screens my good freind !MonDoGuY! sent me. Oh and on his pIII 550@787 (143x5.5) + Geforce3 he was getting around 90 fps in a CLOSED room, 30-35 in OPEN areas and < 20 with the flamethrower on. The game had NO SETTING ADJUSTMENTS WHAT-SO-EVER, just click and go. Ran smooth though. Sadly, pics don't do the game any justice :( Unreal II-Alpha version

This site has over 30 screen shots