A Republican delegate count:
Daily Kos: Mitt's Math #2: Maine Update! Not Enough Delegates To Avoid Brokered Convention: Here's how it stands right now for Mitt (based on the delegate projection most favorable to Romney): IA - 12, NH - 9, FL - 50, NV - 14, CO - 13, MN - 6, ME - 11, Superdelegates - 17, Hunstman endorsement - 2. So far: 134….
There are only 122 winner-take-all delegates left. If Mitt gets all of those, and I'm counting the Superdelegates right, he needs 898 out of 1797 from the other states, or, just about exactly 50%.