August's ATI Catalyst release is here, for both Windows and Linux.
Performance enhancements include OpenGL tweaks affecting Doom 3 engine games such as Doom 3 (duh), Quake 4, Chronicles of Riddick and Prey. On Direct3D the memory manager has been optimised to provide up to 30% performance boosts on certain 256MiB X1000 series cards, so say ATI.
The new Linux drivers supports the latest Radeon Xpress 1200, 1250 and 1300 products along with a unified driver for 32- and 64-bit versions of Linux.
More details and the downloads can be found over at ATI's support site or you can mosey on over to the XP driver page.