Yep, it was announced May 18th, when they announced their fall lineup. Needless to say, I am pissed, everyone I have talked to loved it and said there was so many other FOX shows they should cancel. For me, they could cancel American gayass Idol, that show is so damn lame.
Google Terminator Season 3. There is a lot of articles, even the fox pages dev blog has the writers/director talkign about the cancelation.