From the AP:
http://www.foxnews.com/story/0,2933,134589,00.html
CLEVELAND -- Vice President Dick Cheney said Tuesday night that the debate with Democratic Sen. John Edwards marked the first time they had met. In fact, the two had met at least three times previously. [...]
Edwards didn't forget their prayer-breakfast meeting. The Democratic vice presidential candidate noted the discrepancy at a post-debate rally in a Cleveland park, calling it an example of Cheney "still not being straight with the American people."
"The vice president said that the first time I met Senator Edwards was tonight when we walked on the stage. I guess he forgot the time we sat next to each other for a couple hours about three years ago. I guess he forgot the time we met at the swearing in of another senator. So, my wife Elizabeth reminded him on the stage," Edwards said as the crowd roared.
According to Edwards' staff, Cheney replied, "Oh, yeah."