The guy who runs that fan group is dangerously crazy. Same posts every day, in succession. Then he will repeat and repeat day in day out. I don't quite understand what he thinks he's accomplishing.
That one never redirected to Fox's site and registration hasn't expired yet. IIRC the .co.uk domain was being used by a fan-site until recently. Most likely Fox claimed it and since the domain was already getting traffic redirected it to their site. I'm sure both domains are going to be used in the future.
And here's another fabricated post, courtesy of IMDB:
QuoteOfficial Update For IMDB by Twentieth-Century-Fox 27 minutes ago (Thu Jul 28 2011 13:35:12)
We have decided to break the news here first and let the Internet Movie Database fans of Prometheus have exclusive news before anywhere else on the internet.
We will be launching www.prometheus-movie.co.uk on August 5th 2011 and will feature the footage we debuted at San Diego Comic Con as well as exciting first look pictures and character biographies starting with Raymond Haig.
Visionary filmmaker Ridley Scott returns to the genre he helped define, creating an original science fiction epic set in the most dangerous corners of the universe. The film takes a team of scientists and explorers on a thrilling journey that will test their physical and mental limits and strand them on a distant world, where they will discover the answers to our most profound questions and to life's ultimate mystery.
I wouldn't call this early tbh. They have already shown footage of the new film and discussed it at some convensions. Now i doubt the general public will see any form of footage any time soon but that dosen't stop them from starting the viral marketing campaign now