Season 4 episodes to air in Jan. 2008; movie to air in Q4 '07 (updated 3/22/07)
The Sci Fi Channel announced the order for a 4th season of Battlestar Galactica on Tuesday, Feburary 13th. The initial order is for 13 episodes, the 1st of which will premiere in January 2008.
It's possible that Season 4 will include 20 episodes or even 22 episodes, according to SyFy Portal. Season 2 included 20 episodes as will Season 3. Season 1 only had 13 episodes.
It appears that Ronald Moore and David Eick will be able to produce the DVD movie after all. The movie is expected to be released in DVD format at first. It could air on the Sci Fi Channel after that. (Many of the "original movies" on the Sci Fi Channel were actually released on home video and DVD well before their premieres on Sci Fi.)
A January start date for Season 4 will avoid the heavy competition from the fall network line-ups.
UPDATE (3/22/07): Season 4 will now include 20 regular episodes and a special 2-hr. movie, according to Sci Fi Wire. The movie will air in the 4th quarter of 2007. Afterward, the movie will be available on DVD. The first regular episodes of Season 4 will air in January 2008. No word on when the Season 3 DVD set would be released.