Here is a link to an 8+ minute RealAudio interview with a member of the Cornell search team, dated 4/29/05.
In the interview, the searcher says that the Ivory-bill lives in Arkansas, Mississippi and Louisiana. He says the bird has a "50-mile home range". He describes his distant naked-eye glimpse of the bird, and says he first thought the bird was a Pileated. The bird's definitive direct flight style helped him make the Ivory-bill ID. (Note that Tanner said: "I have frequently seen Pileateds fly directly, in no way different from the flight of the larger bird.")
He suggests that in recent decades, the bird has had to change the way it fed. He stresses the critical importance of getting photographic proof, but says "they have pictures of it now". He says that 14 people can now put the Ivory-bill on their [life] list.