Google image bot updated. It's been a LONG time coming – my album has been up for nearly a year and I was getting tons of referrals from google.com but never images.google.com, until now. Example:

http://images.google.com/images?hl=en&lr=&ie=UTF-8&safe=off&q=site%3Abr1an.net&btnG=Search

It doesn't seem to have completely propogated through all of their servers yet, either.