Besides this proposal is not viable because having a "fair use" repository does not seem to be "fair use" I have to note that the Spanish-language Wikipedia been enforcing the "only free material" policy for at least two years, and closed its local upload recently (about 7 months ago). So the eswiki users asked "why en can use fair use pictures of, say, music albums while they can't" before closing local upload.
Barcex
2007/2/28, Yonatan Horan yonatanh@gmail.com:
That way you won't have all the inconsistencies with, for example, Spanish Wikipedia users asking why en can use fair use pictures of, say, music albums while they can't because they have local uploading disabled and only upload to commons.