So, I finally picked up a PlayStation 3. It supports photos, music and video via UPnP. I have all of my media on a Windows Server 2008 box.

Are there any good, free (preferably) UPnP media servers that run on Windows Server 2008? It would have to run as a service, because I'm never logged into that box.

In fact, does W2K8 have anything built in?