About once a month, I zip up my personal stuff and send to Gmail (only about 20 mb/month). I tried Mozy but it was way too slow and slowed my laptop down. - Mike Reynolds
I backup to an external drive, and i keep all my personal code in subversion (beanstalk if your wondering) - Chris Jones via twhirl
I use my home server LACIE external 500GB NAS on my secure WiFi network; Flickr for photos; now re-considering using Mozy for redundant backup. - Susan Beebe