Part of the nightmare I went through while experimenting with WP-o-matic (no link) was that I accidentally deleted about 12 posts from my blog. Nothing earth-shattering, of course, but I just found an old database backup and recovered those posts. It was a real PITA, though, because the backup was from when I was running WordPress 2.2, and now under 2.3, the database has been changed. So, I had to actually install a dummy blog and "upgrade" it to 2.3. 🙄