krbvroc1, did you try Twonkyvision as your UPnP Media Server. (30 day trial)

I found that Twonky (Win, MAC, Linux) and TVersity (Win only, currently free) enabled the Media Streamer application in OS2006/2007 to interact and operate quickly seamlessly with a large Media collection. I liked the way Media Streamer allowed a playlist to be selected from the UPnP server, manipulated and "additionally added too" on the fly on the NIT.

I especially liked the Album Art support in Media Streamer and Canola1 with the Twonky UPnP Media Server.

I will be testing the new UPnP capabilities of Canola2 in my environment to see how well it performs with UPnP in comparison to Canola1 I am hopeful that some of the ideas proposed from previous activities have already or are making there way into Canola2 as feature improvements.