Follow the money
Instapundit pointed at Bob Ballard, who found the page I'd been looking for: OpenSecrets.org's list of individuals who have contributed to Cynthia McKinney. Scan the list and see if anything jumps out at you.
LATER: This just keeps getting better and better.
Those of you sentenced to live in Congresswoman McKinney's district (mostly in south DeKalb County), please be aware that you do have a choice. I know nothing about her opponent, but you owe it to yourself to check her out: Denise Majette. (Thanks for the good word, Photodude.)