PocketDish Portable Media Companion AV700E is a fantastic match for your Dish Network DVR recorder (and no we are not a commercial). You can download up to 40 hours of television to this PVP (personal video player). It sports a 7″ LCD and according to Ohgizmo.com you can record up to 160 hours of video from other sources at a lower resolution. The AV700E also plays back music and photos, but only rocks a crappy 4 hour battery life (big ow!). Probably best suited for the train or bus ride home.
And, big AND, we also discovered that you can transfer your Dish Network recordings to the Archos AV500. A much more econmical and probably in all likelihood versatile player.
Starts about $600.
For more info see Dish Network.