I figured i'd go ahead and start up a thread for this since there have been a few blurbs about it.
1. James Morrison, who plays Bill Buchanan said on his site that he will not return for a seventh season as the show is moving in a new direction.
2. And this one is pretty crazy: production on the show has been delayed three weeks (into August) as the writers were having trouble as Fox was having issues with the script that required filming in Africa. The writers tried to find places in LA that could sub for Africa, but decided to scrap the entire season thus far. Yikes.
3. And there is a rumor that next season will feature a female president, but I don't know if this is still legit due to the fact that the script was scrapped. We'll see.