Hey there, http://www.blendswap.com is a page where you can upload and download a nice amount of blender files.
Now the licensing question is being discussed. The admin suggest nd and nc choices.
I would encourage everybody who thinks something of this to express themselves in the blog post's comments.
PS: this is probably going to be the biggest .blend files sharing site and it needs a good license base, so something like freesound's license disaster won't happen again. Please do waste your time on this one!