Still it's an old machine and there are other issues more importantHuh? Of course R100/rv100 has overlay support. But the older CPU in this machine would definitely benefit from having any amount of work offloaded! Obviously.
Don't take me wrong on this though. Of course it would be nice to have MPEG2 acceleration. It's just that, in my opinion, driver development should be focused on getting the more important bits implemented right now since XvMC is not going to help with MPEG4 which *would* be a high priority *if* XvMC would be suitable for it.