Under this new plan David will be controlling the drm-core-next, drm-radeon-next, drm-next, and drm-radeon-testing. Descriptions of these Git branches for the Direct Rendering Manager code can be found on the dri-devel mailing list.
The important branches for desktop users wishing to experiment with the latest code is drm-next and drm-radeon-testing. The drm-next branch will pull frequently from the other Git branches like drm-radeon-next and drm-intel-next into this central location. The drm-next branch is likely what will be pulled into the next Linux kernel development cycle for mainline inclusion. For those with ATI Radeon hardware looking to use the latest DRM code under a kernel mode-setting environment, drm-radeon-testing will contain all of the bleeding edge ATI work.