The answer, according to Google Analytics, is surprising to me. The top referring site is Google Images, probably because I have a couple of images such as one of John Paul Jones playing a many-necked mandolin. But the next few referring sites are:
6. locus.cwrl.utexas.edu (my homepage)
7. stc-austin.org (The Austin chapter of the Society for Technical Communication)
5-7 are tied. 2, 3, and 5 are different aspects of my lifestream; people are seeing the same information refracted through different services.