i output from my video card's dvi connection to my ht receiver with a dvi to hdmi cable. my tv then connects to the receiver's output hdmi to hdmi.
hooking it up this way makes it easier to swap between inputs from multiple devices (at least for me it is). all i have to do is flip a little knob around and it changes inputs keeping whatever settings i had from the last time i used the input. pretty nifty.