Mac online backup solutions - 2010

Mac online backup solutions FAQ: What do you know about Mac online backup solutions (Mac online backup services)?

Last year I bought my sister and her daughters an iMac for Christmas, and when I visited them again this year I realized how much data they had accumulated -- data that wasn't being backed up -- including music, photos, and school homework. I quickly realized that I needed to come up with a backup system for their Mac, and because I don't live near them, I knew this Mac backup solution needs to be both simple and automatic.

Does Yahoo Mail have a memory leak?

I'm not sure exactly what's going on, but I'm having a horrible time trying to use Yahoo's web-based email with Firefox this last 36 hours or so. There is some kind of really bad memory leak in the system that makes Firefox's memory use jump up to over 300MB as soon as I look at just two or three files.