I had to emerge the mplayerplug-in to get stuff to work. I'm not having a great time with .wmv files. In firefox the mplayer plugin kicks in and gets to 99% and just sits there. In Konqueror I can get it to work 50% of the time. I can get sound but no picture the other 50% of the time.
I'm at a loss as to getting video files to play properly in the 64 bit system.