Post email: Get invite.

Actually, a better solution: Just upload EVERYTHING to /b/. If it gets reposted by anonymous, automatically add it to a filter list. That way you don't have to pay people to do the work. This reverse-filter idea is a good one!

Okay, well, as a data protection engineer at work and a geek at home, here's my strategy (I do BOTH)
1) Near line/onsite backups: I do a multiple-times daily sync to an external USB drive for critical data. In this case, this includes things like my MP3 library, video garbage that I've collected. Basically anything that I can't replace _really_ easily.

2) Offline/Offsite backups: I use Mozy (as some other users have mentioned). $5 a month, large storage capacity. It's an always incremental backup, automatically runs when the computer is idle. It takes quite a while for the initial backup, but who cares. I don't personally allow my MP3s or some of my video junk to backup to Mozy, but the stuff I seriously care about is there.

For the stuff I'm really paranoid about, I try to make sure I've got copies dumped to my iPhone, which is always in my pocket, so it's not going to be at my home if the place burns down.