Just signed up for a years subscription to Bandwagon - it's a service which will allow me to backup all my iTunes data to either my Amazon S3 account, or to any space I may have on a FTP server somewhere.
My combined iTunes library is running at several Gigs, so backing up in any conventional way (CDs, DVDs, etc) is very clumbersome - So I'm curious how well this will work for me. I'm guessing once the (large) initial upload is out of the way, it should be pretty easy going.
If you want to find out more, you can check them out at ridethebandwagon.com