Yikes. Just for kicks I had a peek at my activity logs. Haven't been posting much so I didn't expect anything. Noticed a large number of 404 errors. Digging deeper turns out that the vast majority of them are attempts to find timthumb.php, a popular php script used to resize images. Judging by the mass of queries, it must be quite popular with the wordpress crowd.
Edit: Looks like it was public knowledge back in August of last year!
