From what I can interpret, the movie follows this particular archiver / journalist, named Gerry Lane (who might be played Brad Pitt), around as he travels the world conducting interviews with survivors. Again, from what I can interpret, it’s almost like a documentary, but set in a post-zombie-apocalyptic world with much more to it than just talking heads.
Firstshowing.net has an article about the original/alternate ending for I am Legend, which is much better than theatrical ending.
If you are a fan of the movie and thought the ending was terrible, check out the alternate ending. I’m not sure why this ending wasn’t used. It went better with the book and tied up the “who set the trap” questions.
Anyway, check the alternate ending out, the 2 disk DVD comes out on March 18th.