I already pushed mesa + libtxc for precise. My mesa packages however are currently superseded by official Ubuntu ones (based on 8.0 branch rather than on master one). It make sense to use that now to spot possible bugs before the final mesa release. Once 8.0 is released I'll push again packages from master calling them 8.1. I'll push X driver later on.
No announcement yet.
Updated and Optimized Ubuntu Free Graphics Drivers