try to make MMR tracker
As soon as Blizzard releases MMR in an API or replay files, IT will be added to the site!
I'm kind of holding off looking into this until LOTV comes out. My gut says they might change the ladder, but who knows.
The MMR tracker plugin currently works only in sc2gears, and sc2gears is not going to support LotV. It would be great if you could integrate the functionality (and even improve it if possible) -- and I bet you would get a lot of people to sign up for Pro just for that.