I guess part of it is expectations. I recommend Mozy to home users, people who don't need to back up drive images. I think if Mark needs to back up 140GB of "photos and stuff," it should work as advertised, though the initial backup does take too long. The one area I'll agree on is backing up email. Naturally, a PST file is going to change daily, and depending on how much of a hoarder the person is (I'm a big one), that can get to be a huge file.

For me, I still think off-site storage (taking drives to relatives' houses or to work) is the best way to go.