Speak of the bloody devil. A new WMC Extender is coming to market. And happily it will support DTS:

http://www.engadget.com/2012/04/16/cetons-echo-extender-for-media-center-will-be-the-first-to-supp/

I don't think anyone should expect it to be any good at playing back common ripped media in popular containers like MKV however. And it will definitely suck at photos and music. It actually supports GIF images. Why?