To be realistic, THQ owns Volition, and as we all know, they're money-grubbing corporate ass-monkies. Like so many other publishers, they don't care about good games, they care about the Benjamins. If they wanted to make FS3, they would have done so by now. They would rather make "Britney's Dance Studio 3: Like Omigod, Way Cool" than continue the Freespace series. What I'm hoping for is that some other, gamer friendly publisher, such as Ubisoft or Acitivision, will pick up the license and develop the game. As Venom said, most of the original crew is probably gone by now, so Volition might not even be the best choice, though I'm not quite sure whats going on inside the company.
Ah damn, I'm being a pessimist again. Sorry.