First, sadly, a new movie just isn't possible at the moment. Joss has stated for the record that he doesn't want to return to the Firefly universe again, and really, that's all right. I like the guy's preference for not milking a particular universe for all it's worth. (See the dismal state of the Star Trek universe for an example of something that jumped the shark over a decade ago due to new series/movies and such.) He even left the popular Buffy/Angelverse to do other things, when he could have just ridden that cash cow for the rest of his life.
That said, Firefly could have been a stellar series, but it got canned before it could really take off. Given the fact that Joss' TV series seem to be increasingly less episodic after the first season, I can only imagine what awesome direction the show would have taken. But, it could be worse. Serenity gave the short-lived series a satisfactory ending, and wrapped up pretty much every burning question about the characters. (Well, except for Book's true identity, but he got killed off anyway.) How many canceled-after-the-first-season shows get that sort of treatment?
"'Casual games' are something the 'Game Industry' invented to explain away the Wii success instead of actually listening or looking at what Nintendo did. There is no 'casual strategy' from Nintendo. 'Accessible strategy', yes, but ‘casual gamers’ is just the 'Game Industry''s polite way of saying what they feel: 'retarded gamers'."
-Sean Malstrom