Suggestions

[Random Talking Bush]

On the Models Resource, there should be a "Rigged" option. If a model is rigged, you click a checkbox while submitting so people will know if a model is rigged or not.

That's something we've considered and it may be implemented in the future.

Seconded. Until then, use the "Zip Contents" menu at the bottom of the submissions to judge -- if there's only OBJ/MTL, then it obviously isn't rigged, but SMDs, FBXs and DAEs should be (if not, then what's the point of having 'em?).