I watched the season opening of Last Comic Standing, 30 May 2006. I think DK was in the
audience while the show was auditioning comics in NYC. Below is a screen cap, and a photo
from Numb3rs that closely resembles the person I saw on LCS. When I taped the show, it
was on Bravo 31 May 2006. That image is on the left. The image from Numb3rs is on
the right.

And here are just 2 screen caps from that show:

Well, if it's NOT David, then it's a really cute double.....