ATi is not releasing any 64 drivers till Windows 64 is officaly released. So it might be a while. Closest thing I saw was a Linux driver. But only for 2D
last i heard XP64 comes with 64bit CATs bundled in it...and thats the only 64bit drivers youre gonna get till XP64 ships retail...unless you by happen chance get on the CAT beta team or some other strange occurence you should happen to run across any other sets =P