Nice Tony. I only briefly tried Orb last week when searching for a way for a friend to stream music from his PC to his iPod Touch. I set him up with Simplify Media instead, but thought it might be useful to you because it also does video which was what you were after.

I remember it getting a lot of media attention a while back as one of the first solutions to stream to devices like the Wii and PS3.

How is the TVersity setup if you only intend to use it for music? I may have my friend look at that one too because I've also just found a more generic UPnP app for the iPhone/iPod. I think Simplify Media is proprietary - though it does offer the advantage of allowing a remote user to use iTunes (or WinAmp, etc..)