Checking my junk mail folder, I did get a message last night saying that someone had changed my Yahoo password. The e-mail contained 18.104.22.168 as a signature, which resolves to Belgium. Weird.
Hopefully the message is just delayed - it'd be a real pain to have to go through and rebuild everything I have on Yahoo (mainly lots of yahoo groups), but also some e-mail and address books . . . *sighs*