Saw the movie . . .
I saw Prometheus is IMAX 3D today. On the good side, the set designs were amazing and the movie overall is gorgeous. This was also probably the best live action 3D movie that I've seen as far as 3D goes (Avatar is a close 2nd for me). The 3D is not overdone, it just adds very nicely to the movie experience, IMO.
I won't spoil anything about the plot. I will say that you will likely come out of the movie feeling disappointed - either a little or a lot, depending on your expectations for the film.
I am not sorry I saw it at the theater, though. Like I said, the visuals are stunning. It is worth seeing it on a big, bright screen just for that reason alone. Personally, I was hoping for something more profound from the story based on how Scott and Lindelof hyped the film. That's what I get for having such high hopes going in I guess . . .