Dick Cheney won this hands down. Edwards looked polished, but exasperated by Cheney's calm enunciation of his conservative principles and common sense. Edwards kept complaining about Cheney's association of Iraq and Al-Qaeda, but Cheney corrected him that regardless of Saddam's involvement with 9/11, he was still a supporter of terrorism, citing his financial aid to families of Palestinian suicide bombers. When Edwards mentioned the tenuous link for the third time, he was sounding desperate.
Edward's criticism of the Federal Marriage Amendment was lame. He says he supports a man/woman definition of marriage, but Senator Kerry voted against the Defense of Marriage Act, so the record seems to say that they would do nothing to defend it.
I don't remember hearing it come up, but on another issue, abortion, here's how the Democrats voted on two abortion-related bills during the last year:
Partial Birth Abortion Ban:Kerry Nay, Edwards did not vote
Unborn Victims of Violence Act:Kerry Nay, Edwards Nay
It is interesting that Edwards, who made tons of money putting OB/GYNS out of business, seems to be able to channel the thoughts of the unborn (Best of the Web, third item) (NYTimes) while not even considering them to be deserving of legal recognition when their life is ended by an act of murder.