For all of $99, Dell will now provide you with a second 80 GB hard drive on some Dimension models. All your files are backed up continuously and, when the dreaded hard drive crash comes (as it eventually will) you're protected.
What's not to like? It's cheap enough, capacious enough for all but the most rabid file traders and probably as reliable as any electro-mechanical system can be. And it happens automatically, so Joe or Jane Consumer isn't troubled by administrative details they don't understand.
It's about time.