MoveOn.org had a nationwide town hall meeting with over 1000 people hosting parties in their homes while Dem candidates answered questions about the Iraq war. MoveOn members were then asked to vote for who could best lead out out of the Iraq war. Of those who actually watched the forum, John Edwards came in first and Bill Richardson came in second. Overall, Obama took first place but that probably has to do with his popularity rather than his performance as the rest didn't actually see the forum. Hillary was very distant in both polls. Even Kucinich beat her.
You can read the stats at the MoveOn website.