I got to see special preview screenings of Ong Bak 2 and Adventureland over the weekend. Ong Bak 2 had some great action, but I found myself bored for way too much of the movie. I recommend it if you're starving for some modern kung fu, but in all honesty Chocolate (same director) was a better package, story AND action.
Adventureland was AMAZINGLY good. It delivered on having a pretty good story and good acting along with a lot of hilarious laugh out loud moments. I really liked it, and recommend it when it comes out wide release in a couple weeks.
I also watched Knowing on kind of a whim. My advice to you is to ignore and forget everything the trailers have told you. SEE THIS MOVIE. It's so much better than the ads are leading you to believe. I saw it mainly in hopes of unintentional Nick Cage comedy and goofiness, and was just blown away. Also, I recommend seeing it in theater very highly. I know how open and proud the forum is about stealing things, but it's very cinematic. There are a couple of awe-inspiring visual sequences that wouldn't be done justice by your computer screen and computer speakers, no matter how big they are. Roger Ebert called it one of the greatest science-fiction movies he's seen. I dunno about that, I still need some time to think about it and all, but I loved the movie.