Video of the second Edwards/Cheney meeting has
been found. From Mark Kraft's Livejournal:
That's Cheney on the left edge of the screen, administiring the oath to newly minted NC Senator Elizabeth Dole.
Update: Tim Russert is going around saying that Edwards and Cheney met backstage on his show, and shook hands and exchanged pleasentries. This is the gaffe that killed the debate for Cheney.