SciFi had an article on "New Stargate movies finally ready to begin shooting?" which is more or less, well, not news... http://scifiwire.com/2009/09/amanda-tapping-new-starga.php
EXCERPT: Amanda Tapping says that a new Stargate SG-1 movie could begin production later this year, as soon as the first season of Syfy's upcoming SGU: Stargate Universe wraps. A new straight-to-DVD movie was announced a while back.
"As far as I know, we may start in late fall or early winter this year," Tapping said in an exclusive interview. "And I will slip back into Sam Carter very nicely; I'm looking forward to it.
...........
What about a new Stargate Atlantis movie? "Atlantis is still being talked about for this year," [Martin] Wood said. "Right now, I'm so far removed from it, but they'll let me know, and I'm happy to do it."
REST of article at link above; mostly just supposition and stuff I could swear I've already read in another article just recently. While it says nothing about a green light on the SGA movie (and I'll believe the SG1 movie is being made when it's listed in Variety), I guess at least it keeps the name in the public (sorta) eye.
NOTE: Article was originally titled "New Stargate SG-1 movie in works" and then mysteriously changed to "New Stargate movies finally read to begin shooting?" Hmm....