“What’s the deal with the 24 movie?
We were going to make it in the break this year, but it’s just too much to ask the writers to do. We are going to do it. It’s just a question of when.”
That’s Kiefer answering a question about the movie only last thursday at a party to promote the new series. So confirmation that the movie, which was due to start shooting this may in the three month hiatus period between series six and seven will defintely not go forward during that time. It would appear now that earliest the film could shoot is the hiatus period between series seven and eight (should the show get that far), for a release late 2008.
source : nymag.com