Here is the schedule:
http://www.nbcolympics.com/event-results-schedules/index.html
And if you have certain cable/satellite providers you can sign up on the site and watch some events live that don't make it onto tv. I have directv and was able to sign up for it.
The live streaming and replay schedule is here
http://www.nbcolympics.com/video/live-full-replays.html