Just watched it yesterday.
Chocolate.
This movie is done by the same crew that did Ong Bak, and The Protector. About a girl who is "special" and austistic and has an uncanny ability to learn martial arts just by watching other people do it. Highly realistic? No. Highly entertaining? Yes! Lots of butt-kicking Muay Thai action in this one. It starts out somewhat slow, but it picks up the pace later on, and definitely gets good towards the last 1/3 or so.
Trailer
http://www.youtube.com/watch?v=Axf_E...eature=related
Also here's the trailer for a movie called Raging Phoenix, also done by the same company and starring the girl who starred in Chocolate. This movie is newer and hasn't yet hit DVD.
http://www.youtube.com/watch?v=ejM7ZCEzs5A