Steven, have you taken a look at VideoLan yet? VideoLan has video and audio capabilities as well as streaming capabilities. Better yet, its sourcecode is freely available. I would imagine that features such as synch audio play would be a lot easier if you knew the source code! At some point, I think you should take a serious look at integrating this with Xlobby. I don't know what the VideoLan makers would allow one to do with their program but it would seem that revising it is allowable as they do give us the code. Ideally Xlobby could come preconfigured with it. Ofcourse, the option to use zoomplayer, winamp, foobar, etc should remain.
hjackson