Aint-It-Cool-News.com is a great website for fans of science fiction and other geeky movies. These days it's one of the most quoted websites for movie quotes. Recently one their writers, Andy Howell, did an interesting rant of the science in the 2009 Star Trek movie. He points out what's nonsense, what makes sense as a plot device, and what actually works. Give it a gander. There's also a good followup on the article too.
I like a good analysis like this. It goes beyond the whole, “That sucked,” or, “That was stupid because…” reactions and gets into the nitty-gritty of the movie.