I remember watching that Brokaw-Rose conversation. It WAS the weekend just before the Tuesday election that they were talking about how little they knew of Obama.
The video is still on the Internet.
This one was posted on Youtube on October 31, 2008:
This one was posted on Youtube on November 1, 2008:
Election Day was November 4, 2008
In another interview later in the day, Hannity had some dupe from HuffPo on who calls himself a journalist. He said there wasn't enough time to look into Obama's past, but since he's been elected there is really no need now because these things have all been discussed.