I found some time to play around with this on the weekend. Using a stand alone java program, I was able to browse my TwonkyVision (see http://www.twonkyvision.com/UPnP/index.html ) music server. This was using Satoshi's CyberLink library - it's so nice when software does what it says on the tin .

And so it shouldn't be too difficult to set up tRio as a Control Point (and Media Render) that'll play music from Media Servers on the local network. It'd take more effort to expose the induvidual receivers as Media Renderers so that they can be controlled by other (non tRio) Control Points.

The next step is to integrate that I did into tRio and try get it to play a tune off the server.

Cheers
Paul