One of my favorite ex-feature of another board was the ability to host it here. There should be a plug in script for PHP somewhere that supports it. I'm not asking for a huge amount, like 5 files all under 100kb each. or something small. I'm not sure what kind of storage you can work with, but that would be cool, and would take up less than .5 megs per user.
Anyway, maybe something to think about in the future.