And here it is. The trailer for Prometheus proper. I must say it look looks fantastic.

In Greek mythology Prometheus was “a champion of mankind, known for his wily intelligence, who stole fire from Zeus and gave it to mortals.Zeus then punished him for his crime by having him bound to a rock while a great eagle ate his liver every day only to have it grow back to be eaten again the next day. His myth has been treated by a number of ancient sources, in which Prometheus is credited with – or blamed for – playing a pivotal role in the early history of mankind.” – taken from Wikipedia.

This strongly hints at some of the themes that the film will touch on.