This is unrelated to OP, but I got a chance to play FireFall at PAX East, and talked to CornBoy, Colosus, etc in some detail about the game.
WARNING: IT IS NOT TRIBES 1, 2 or VENGEANCE. Yes, you have jetpacks, and the assault class has something sort of like a disc launcher - the jetting physics even felt somewhat similar to Tribes 1. However, the game types, map layouts, and physics (no skiing) make it a completely different game. Don't get your hopes up if you're looking for Tribes.
I didn't get a chance to play around with it for extended periods of time, but from what I could tell the gameplay was quite simple and straight-forward, it just didn't feel like it had a very high skill ceiling. This assumption is by all standards premature, but that's just the sense I got. I hope I can be proved wrong.
Talking to CornBoy, he reiterated over and over that this is essentially his dream game, what he would have liked Tribes to be in the first place. Even though it exhibits MMO-like qualities, they assured me calling it an MMO was wrong as its not based of quests and item collecting, more dynamic. PvP seems to be a big focus.