Thank you to several of my friends for pointing this out – my blog got hacked.
Since then, I have uninstalled and reinstalled WordPress three times, deleted all of my databases… and still kept getting hacked. I’m hoping that this time, I’ve got it sorted. If you see this come up in your news reader with something like “Buy C*alis” (not starred out) as a header, please let me know. It SHOULD say “Slashed and Burned, Again” at the top.