First of all thanks for the 4.3.0 packages, my new Radeon 9200 ran out of the box with completely libre 3D support (expect that I had to down- grade xlibmesa-dri, which has already been reported several times). Great work!
Are you planning to integrate a more recent DRI version into the 4.3.0 packages or is this technically difficult due to API changes? The xlibmesa-dri included in xfree 4.3.0 is from august 2002 and jugdeging from the dri-devel lists there have been _lots_ of bugfixes and improvements since then. I know that this is not the the typical Debian way, but DRI is one of the few places outside the kernel that tends to lockup the machine in buggy situations and sarge will be stuck for a long time with 4.3.0.