I own a Sony BDP-S480 with the latest Sony firmware installed. I have it working like a charm with Wild Media Server
In order to have it working using DLNA over wired network connection I picked the default Sony DBP profile (S470) that came with the server and amended the following settings:
I added mkv to the list of extensions for films
I removed avi from the list of extensions for films because a lot of my avi videos are in fact divx which it does not render
I removed divx from the list of extensions for films
In the filetype settings window I emptied the DLNA field for mkv to prevent WMS to override the mime-type to m2ts since the player has full mkv support
I made sure that the max video resolution is set to 1920x1080
I am able to play the following:
My Sony AVCHD video camera files (m2ts)
MKV 1920x1080 with multi audio and subtitle tracks. One can select audio/subtitle track using the player's remote control
MKV 3D SBS
I found some restrictions though:
So far I have not been able to play videos without freezing every couple of seconds when the bit rate exceeds 25mbps. I have not tried those using a USB drive, so it still might be just a network interface limit. My rule of thumb so far is that if the MKV is around 12GB it will play it without problems over DLNA.
I have been playing around with 3D, which works fine, but I have not been able to get subtitles working properly in 3D. Still investigating this.
I will keep playing around with this and if I find more tweaks I will add them to this topic.