Rapidly expanding health and fitness app creator MapMyFITNESS is arranging an additional $3 million in financing from Square 1 Bank. This latest capital infusion comes on top of a recent $9 million Series B round from Austin Venture Partners and Milestone Venture Partners. When Square 1 completes its investment, MapMyFITNESS will claim a total of $18.65 million in venture funding. The company also just surpassed 10 million registered members. Boom!