Wow, I usually get the Pats games but I checked the TV grid and it wasn't there! I'm glad the NFL decided to air the game, no less on two open air networks, as there will be records broken. Good on the NFL

SI.com

Here's an interesting article about the behind-the-scenes issues:

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NFL Net calls a double reverse
NBC, CBS also will air Pats game
By Steven Zeitchik and Kimberly Nordyke
Dec 27, 2007

After being almost nowhere, Saturday's Patriots-Giants game suddenly will be everywhere. The NFL Network has hammered out a deal with NBC and CBS for those networks to broadcast the teams' season finale, in which New England will try to become the second team in NFL history to finish with a perfect regular-season record.

If the Pats win Saturday, they will be the first to wind up 16-0. The 1972 Miami Dolphins finished the then-14-game regular season undefeated. The full NFL Network telecast will be shown on both networks, which will pick up the production work, halftime show and booth calls of NFL Network broadcasters Cris Collinsworth and Bryant Gumbel.

Sources said the game also will be shown mainly with NFL Network commercials, providing a massive boost to the network's advertisers by increasing by tens of millions the number of households that will see the ads. It's possible that some local spots could be sold by network affiliates.

It was unclear at press time whether CBS and NBC would be allowed to swap in their own in-game sponsorships or air their own pregame and postgame shows. No money is believed to have changed hands in the deal.

The Hollywood Reporter
complete article