It would ultimately be up to the NCAA to authorize and create a channel, just as with the MLB and MLS channels. Considering how much the organization is tied up with major cable outfits (ESPN, FSN, Comcast/NBC Sports), I doubt such a service would happen anytime soon. An ESPN3 channel would be great to see, as it would bring in a significant portion of these games, but since you generally need to have pay-TV service to be eligible for ESPN3 (aside from Verizon FiOS, I believe), it's kind of a moot situation for cable cutters. Would it be great to have a subscription service that brings in all of those cable games, regardless of broadcaster (and OTA games too, secondarily)? Absolutely. Do I see the NCAA doing it anytime soon? Absolutely not. It really is a shame that big media is so slow to react to the changing face of consumption, but it shouldn't be surprising to many.
It's worth noting, if you're a college basketball fan at all, that all of the NCAA Tournament games on MMOD were available in NowhereTV this past March. Hopefully RokuChris can make that happen again next year; it was great to have!
Roku XDS, AppleTV 3rd Gen
15mbps on TWC, DIR-615 Router (wifi-N to Roku)
Panasonic P42ST30 HDTV & BD-85 Blu-ray Player
Onkyo HT-S5400 7.1 system
Netflix, Amazon Prime, Hulu+, season passes, MLB.tv, IW Browser Roksbox