No. Movie series planned. First movie due in 2012. Killing Jack is like killing James Bond at this point. Jack Bauer is too lucrative a property to kill off.
SnakeDoc
Maybe they’ll take a few seasons off; make a few feature films, and bring Jack back.
I have read that the 24 movie will cover Jack’s early life as Navy Seal, etc. up to the time of his being recruited by CTU. So that would take care of him being killed off at the end of the tv series.