Definitely will be some interesting things in this release, not entirely sure if DRM/DRI will be enabled by default but here's hoping.
I thought oga@'s was working on nouveau.. but I guess that'll be a 4.5 thing..
Firefox 3 might not make it into the release it seems, let's hope 2.0.0.15 does at least... or 2.0.0.16 which is due out on the 15th of this month.