Can Mynd Calendar Find A Business Model?

Reading the truth about Twitter's genesis story reminds me of how often startups begin with flimsy-sounding ideas and defer defining a business model until they reach a critical mass of users. Mynd Calendar -- a "mobile calendar that learns where you spend your time and the people that you meet along the way, becoming increasingly helpful the more you use it" -- seems to be pursuing the same strategy: get lots of users and figure out later how to monetize them.