after acquiring a Western Digital TV Live Plus box to add to my older system and receiver, I don't see much use in paying a real premium for internet connectivity built into the receiver. Price wise, it is much more cost effective to add the services with a small, separate box.
Audio, video, just about any kind of digital a/v file you want to play...network shares, USB input, Pandora, Netflix streaming, and on and on. Give the WD TV Live Plus a look, it may just fill the void until network connectivity is fully built in to most, if not all, a/v receivers without the huge premium in price.