I've been developing an audio/video player programmed in c# and running on silverlight 4, and it's pretty good....
I'm planning to throw it into FHFS and you could consider using it for HFS 3 also to bring the long awaited streaming ability
![Smiley :)](/forum/Smileys/default/smiley.gif)
Of course you could always use HTML5 but this is more fun
![Cheesy :D](/forum/Smileys/default/cheesy.gif)
(and it looks better)