The Dirac project was accepted in the Google - Summer of Code project for 2006.
One of the projects they plan on implimenting is a Dirac Java applet. ( Equivilant to the video player applet for the Theora video codec. )
A Java video player capable of rendering a high quality video codec within the NSV format would be a huge plus and cover all operating platforms. ( Including the Mac. )
Dirac Java Decoder Project