nordlead on 15 March 2010
You can (in theory) setup Windows Media Player to serve your files over to your PS3, but I never got it to work.
Winamp also allows you to stream data to your PS3, which is what I used for a bit but I decided having to run my PC & PS3 at the same time was a waste of electricity. Oddly enough, building a HTPC will take ~6 years to pay for itself in electricity costs 
Luckily it provides many other benefits like less wear on my PS3 and better media functionality.
