Quite a few people here keep mentioning they would like an upload board.
Esp. me
Seriously though, I think it would be cool. It would be good to have an option to share smaller files without having to hack a zip into a gif or set up a torrent for really small files and such.
I believe hotaru has a hack of Wakaba for the purpose of an upload board.
But I don't know how such a board could be effectively moderated, though.