In order for VIDEO->NETWORK to show anything, you must have a NAS or Server with “shared” SMB or CIFS volumes (a/k/a WIndows Shares).
In order for VIDEO->MEDIA SERVERS to show, the media server must be running UPnP or DLNA. I don’t have a PS3, so I didn’t know it could be a Media Server. I thought it was only a DLNA CLIENT.
PS3 Media Server, like TVersity, is a Windows-based media server software. Despite the name, it happily streams to a number of DLNA compliant devices (not just PS3). It should work fine if it’s set up correctly but I prefer TVersity; didn’t have much luck with PS3 Media Server.
BigFish : Are you able to connect to YouTube / Pandora? Just want to establish what level of connectivity you have to your router. Like Mike says, does the Live ‘pass’ the check connection test?
Settings > Network setting > Check Connection