I've heard xdrive is pretty good as a media 
archive, they give you 100MB for free. I used to 
use Driveway, but they closed up shop not too 
long ago. For a free service, I'd definitely give 
them a look. For Mac users, you can check out 
Apple's iDisk, I think it's awesome, and I have 
mine at 200MB right now, and it mounts right 
on your desktop. If you have any questions, 
just drop me a line. Hope that helps.