There are a lot of people that would be interested in a Glide64 Direct3D port. I think ports of Glide64 in Direct3D and OpenGL would be the best way to get things going with video plugin work. The Glide API seemed like it became a deterrent for other people to work on it. Or it could be the whole reversing RSP ucodes bit. :p A more recent API would attract more devs though.
The latest changes for Rice seem to have gotten SOTE working well on the XBOX. I'm giving the XBOX side an overhaul. I don't know who wrote the original XBOX code for Rice 6, and the most stable XBOX port is that of Rice 5.60. Quite a lot has changed since then. I've got some XBOX specific changes that were excluded from the XBOX port of Rice 6, and some vertex handling changes too. Lots to sort through.