Last night David Airlie has requested Linus pull from the drm-fixes branch in time for the Linux 2.6.25 final release. Among other changes, this branch contains fixes for the RS690 + 2.6.25-rc3 DRM + xf86-video-ati hang, VIA fixes for a few upstream bugs, and new ATI card support in the DRM. The card support is a new RS690 PCI ID and adjusting that RV550 GPUs are based upon the RV530 series (not RV515). David's mailing list message can be read at SourceForge and the drm-fixes git branch can be viewed using the Kernel gitweb.
The Linux 2.6.25-rc6 kernel release announcement can be read on LKML.org. It looks like the Linux 2.6.25 final kernel will be out in late March or early April.