Looks like the majority of the coverage is on your locals plus these channels:
Sports Mix Channel (Ch. 205 and 600)
Watch all of NBCU's coverage of the 2012 London Olympics at the same time on our exclusive Sports Mix Channel. When you want to watch just one of the NBCU channels, just select it on your screen to tune in.
I also created a Favorites with the Olympic channels. I also changed the QuickTune to include them.
Since I don't subscribe to the Spanish package, Telemundo doesn't work for me.
I had hoped they would do the Olympics Mix (750) like they did for the Open a few weeks ago. They don't have a dedicated Olympics mix, it's just the same as the other two mix channels (like 600). I agree, it should be in HD also.