It's a big day, folks. Today Molson Coors becomes the single parent of MillerCoors, which will represent Molson Coors's U.S. business unit after that company's $12 billion buyout of SABMiller's 58% stake in their former JV, which was conceived in 2008. The transaction will help facilitate the tie-up of SABMiller and Anheuser-Busch InBev, which will now account for one in three beers sold worldwide. (More once we talk to the suits later).