In "Online Backup Options Expand [1]" (2007-04-09), I mentioned two potentially promising online backup services - Mozy and Bandwagon - that were not quite ready for prime time. Last week, both services announced that they are officially available for public beta testing.
Berkeley Data Systems' Mozy [2] offers unlimited online storage for a mere $5 per month. Their Mac backup client, previously in a limited beta, is now available for anyone to download. If you're not ready to spring for the monthly fee or have only a few files to back up, you can sign up for 2 GB of storage at no cost. Although the current version of Mozy is a bit better than the one I looked at a few weeks ago, it's still clearly a beta. Among the problems yet to be ironed out are aggravating delays (over an hour on my test machine) in opening the configuration window - every time you open it! - and occasional hangs during backup or when attempting to cancel a backup in progress. The Mozy download weighs in at 5 MB.
Bandwagon DIY [3] from Xackup uses storage space you've set up separately on Amazon.com's S3 [4] service to back up your iTunes content online. When the beta program ends sometime in May, prices (not counting storage space) will be $2 per month for the standard Bandwagon DIY service and $3 per month for Bandwagon DIY+, which also supports syncing iTunes content between two Macs. Bandwagon DIY beta 1 is a 4 MB download.
[1]: http://db.tidbits.com/article/8923
[2]: https://mozy.com/
[3]: http://ridethebandwagon.com/
[4]: http://www.amazon.com/s3/