Valve is supposed to release dotXSI plugins for softimage|exp, maybe they export to the same version JO/JA uses.
Oh yeah. There's Wings 3D (
http://wings3d.com), which is based off of or inspired by Nendo and Mirai. Mirai was used by Bay Raitt for Gollum in TTT, and Nendo is a $100 version of Mirai that doesn't do animations. It's all with these context sensitive menus, which are supposed to be really intuitive and far more efficient than other stuff.
Here's (
http://cube.phlatt.net/home/spiraloid/movies/bayPlayMirai.avi) a video of Bay Raitt doing some stuff in Mirai... Pretty amazing.
Worth making a plugin for. I might do it when I'm done with my college applications.
Edit: Oh crap. I don't think it does skeletons at all, seeing as how you can't animate in it, so I'd have to make a lot more than a simple exporter. Bah.