The Flight That Fought Back
By arungupta on Sep 11, 2005
A complete timeline of the flight is available here. The different theories behind how flight 93 crashed are explored here. This site was created 9 days after 9/11/2001 and has some really thought provoking questions. I've thought about a few of them myself as well. Flight 93 memorial page and United's tribute to the heroes are some related pages. Having just watched the movie, I was able to correlate with these heroes in a more personal manner. Some caring Americans have also hosted this page to pay a tribute.
And BTW, if you missed the documentary then you can purchase the DVD here (will start shipping Oct 7th).