I also use PS3 Media server, even though I don't have a PS3. I do however have a Samsung LCD TV that supports DLNA... So I can use PS3MS to play movies (and mp3's and pictures) on my TV (using a wireless N network by the way).
There are some problems though. The TV doesn't support all possible codecs. I can transcode most stuff with PS3MS, but then I can't seem to fast-forward the movies (they'll stop playing). But overall, it's a great program.
