Well Richard Dean anderson revealed in a recent interview that the third SG-1 movie has indeed been green lit. So Wooooooooooooooo! on that part.
Richard Dean Anderson has also stated that he will be in multiple episodes in the early run of Stargate Universe. He will also be appearing with Michael Shanks and Gary Jones in the first Universe episode.
What does everyone think? http://www.gateworld.net/news/2009/04/anderson-confirms-sgu-appearances/