This morning Pioneer Japan released the DVH-P530, a new in-car DVD and CD player. It's not only compatible with MP3, WMA, and AAC files, but also DivX...
If you want the best audio experience when it comes to movies, the TS-WX88A, a subwoofer for your car, is also available.
http://www.akihabaranews.com/en/news-15973-New+Pioneer+In-car+Audio+System%3A++The+DVH-P530.html