The more I see of Mass Effect 2, the more psyched for the game I get. Not only has BioWare redesigned the layout of the official web site, they've also released two great new trailers showing off the Adept class and how Tali will fall into the general storyline.
You can watch the trailers and check out a few new screenshots here or watch the trailers below, however WARNING, the Tali trailer does contain some minor spoilers.
Personally, I'm glad that Tali's back, and even more excited that she once again seems to be a member of your crew. What can I say, I have a thing for alien babes stuck in clean suits who'd die if I kissed 'em. What? It's the voice. Drives me wild.