Shirish Nadkarni is a serial entrepreneur with 20+ years of experience in creating consumer businesses that have scaled to tens of millions of users worldwide. He was the co-founder of Livemocha, the world's largest language learning site with 15+ million registered members. Livemocha pioneered the concept of social language learning and was later acquired by RosettaStone. Prior to Livemocha, Shirish was the founder of TeamOn Systems, a mobile wireless e-mail pioneer that was acquired by Research in Motion in 2002. The TeamOn technology served as the core foundation for Blackberry Internet E-mail, which had over 50 million users at its peak.