WSJ.com - Personal Technology: Mirra Backs Up Files For Access Anywhere, But Has Rough Edges: "The age-old problem of backing up your computer files is even more urgent today. With PC prices plunging, the most valuable portion of your computer is the personal data, which would be impossible or difficult to re-create if the PC were lost, stolen or irrevocably damaged.
Now, a small Silicon Valley company, Mirra Inc., has come up with a hardware product that aims to finally solve the backup problem. It's called the Mirra Personal Server, and despite that techie name, it's really a sort of small auxiliary computer that attaches to a home network and constantly backs up all of your key files."
$399 for 80 gig -- price/performance reaches a point where dedicated home backup servers are practical... I'll wait for a multi-function home server "appliance", however.