A couple month ago I started working with Wonderful Machine which has been great so far. If you're not familiar with them, check out their website, bookmark it. Here's a brief description what they do for people looking to find a photographer:
Wonderful Machine provides art buyers with the most comprehensive source of high quality photographers doing all kinds of work, all over the world. We’re selective about the photographers we show, we list them only in locations where they actually live, and only in specialties in which they are highly proficient.
Here is (link) a recent emailer where I got featured and this is how the current feature of a rotating specialty category on their website looks like, called Rock Bottom:
Read more about the above photo here...