Just had a chance to listen to a webinar from back in May called "The Great Recruiting Discrimination Debate."
If you haven't watched/listened to it, I highly recommend it. It's one of the best I've heard. It gives very specific examples of discrimination both large and small and has a wonderful panel of folks including both recruiters and EEOC staff. It focuses quite a bit on the obligation of recruiters to refrain from discriminating on behalf of clients.
You can access it by clicking here and clicking on "Watch the Webinar." Note that you may need to disable your pop-up blocker (in IE you can do this simply by pressing and holding CTRL then clicking on the link).
The second round happened on November 14th and I'm hoping they'll post that soon.