So I saw Star Trek yesterday, and it was pretty awesome.  I know I probably don't have the most credibility ever, but you'll just have to take my word for it.  I think it may just be my favourite movie of the year so far, and it's definitely right up there with the best Trek films.  The casting is great across the board, and the film does a perfect job of straddling that fine line between staying true to the original material while still appealing to people who've never watched any Star Trek (unlike, say, the ridiculously terrible Nemesis, which also tried to go for a wider audience with a more action-heavy film, but failed miserably).  There are definitely quite a few changes, but you never get the "this is a slap in the face to the fans!" feeling, or the feeling that things have been changed just to be different.  It's nicely reverential to the source material, with lots of little references for the fans.  It's exciting when it needs to be, emotional when it needs to be, and has a healthy dose of humour sprinkled throughout.  It's pretty great.