Try this ap/service. I am able to stream all my videos (including those that I have incoded for ipod and divx etc.), I stream some internet radio to my ipod with this (have not tried on my dvr). I am also able to stream youtube and others to my dvr.
I'll give that a look. Rhapsody tends to be a tough one because it streams with DRM. I have a Roku Soundbridge which does a nice job with Rhapsody but it would be nice to have fewer devices in the ent. center.