The FCC and the U.S. Justice Dept. have now both given their approvals for the Comcast acquisition of NBC Universal, subject to a number of conditions. Conditions include that Comcast must make NBC shows and movies available to rival online services, and that NBC's owned and operated local television stations produce and air an additional 1000 hours per year of local news and programming (collectively), expand Spanish-language programming, and the top O&Os will need to team with local non-profit news organizations to produce free, on-demand content.
Some initial coverage from Washington Post, The Politico, and TVNewsCheck.
The FCC press release