DerTree, your work is fantastic and we'd love to have you.
So far I think Origin has been handling the soldier animations and hasn't had any problems with it. You can definitely send him a PM and see if he wants help, but I suspect it will be his game unless he asks for any help.
We probably need models as much as we need animations (ie - what we have is already animated). Have a look at our
general TODO and the
TODO for 2.4 under the Artwork section. There's a list of 3D models we need there. The 2.4 list is stuff we need most urgently, and it's got one entry for models: crashed versions of two interceptors. You can see examples of other crashed models at /base/models/objects/aircraft/crash_*.
And I will also make a plug for mapping. The mapping interface is not as easy to use or as advanced as Blender or Maya, of course, but we do need more mappers especially because it doesn't always attract modelers experienced with Blender/3DSM, etc.
Let us know if you have any questions and feel free to make a new thread if you're considering anything specific.