I still wonder if anyone has seen Cheney.

Isn't it possible that people are just a little hyper-sensitive about the whereabouts of Cheney because they think that he should be a central figure in the administration? I'm sure he's doing his part, but he's mentioned that he doesn't care to be much of a public figure because he has no further aspirations. Also, I don't exactly recall Gore being that visible until later in the administration when he was trying to distract attention from Clinton's fiasco and knew he was going to run for president.