Yeah, I'd say Palmer is dead along with Tony & Michelle. The Powers That Be have said so on numerous occasions and 24 isn't like Star Trek where there are always ways to bring people back from the dead. Dennis Haysbert has publicly criticized the writers for "killing the first black President". I doubt there will be any love lost between them.
No love lost between Hastert and the 24 producers?
None whatever. They didn't even mention him on Rush's show when they were talking about the people they were sad to kill off.