Check 506sports.com for local coverage, if the game is blacked out or not in your local area. Just like the pro sports, Collegiate sports are also blacked out in local markets. Here soon though, that may change in 2014-2015, once Congress gets the bill pushed through, to stop the mass/little market black-outs.
As for the big games, the replays would be on the RSN's, or if out of market, would be shown on either those or ESPN. Otherwise, it would be shown on one of the national channels (ABC, CBS, FOX, NBC), or ESPN.
Like I stated above, use 506sports.com for looking up who is playing and what network they will be shown on. The best thing is, that the site puts up a map, with a legend, for the network coverage.