>Mozy seems really good, and I am almost leery because it seems to good to me true. Do you have to install their software to use it?

I have been really happy with mozy. I started using it about 9 months ago after I read a review of it in PC Magazine. One of the latest issues of PC Mag recommends it in their review of free software (I think mozy is free up until 2 GB). I've had to use it once to restore a file and it worked fine.

You do have to install their software, as far as I know, and I think it may be a bit of a resource hog. I use a program called Top Stats and the mozy program accesses the hard disk quite a bit, checking for file changes.