I found this online backup service called Mozy. It works pretty well, and it is free!! The free version offers up to 2 GB, and you can backup more than one computer. If you need more than 2GB, their unlimited version costs $4.95 / month.
For each person you refer, you can have 256MB more. So, if you want to try it, just click here, or goto their website www.mozy.com and use my referral code: SW5GZF.