DLNA Server work with Sony Bravia
There is plenty fish in that ocean. So it all depends on your patience, budget and admin skills.

If you want good quality for free and easy to setup, I would recommend PS3 media server http://code.google.com/p/ps3mediaserver/. It worked well for me.

I sold my Sony gear last year when I moved so I can not attest that it works now but I don't see why it would suddenly break compatibility. It works with all my DLNA clients (with a few limitations over WiFi and perfectly over the wired Gbps network).

There are others and most notably serviio http://www.serviio.org/ that work well but aren't necessarily the simplest to setup.

Have a look at http://alternativeto.net/software/medialink/ to see if you find anything else that you would like.