"So what, many of you have been asking, IS happening with the SG-1 and SGA movies? Well, at last report, Carl was about 20 pages away from a first pass of the script which will then find it’s way onto Brad’s laptop where he will do his pass. The Atlantis movie is still an outline but Paul and I will be starting work on the script in the coming weeks and hope to have it completed by April. An official production start date for either movie has yet to be announced. More detailed discussions on both movies will be taking place in the coming weeks and, hopefully, I’ll have more definitive news for you then regarding everything from actor participation to a preliminary schedule."
So, an answer, but not an answer, as even he doesn't know. So, maybe around Sweeps Weeks we'll know something? Who knows.