Sabeer Bhatia, the founder of Hotmail, has joined the board of directors of Navin.com as co-chairman. Bhatia brings experience in messaging from founding Hotmail, which he later sold to Microsoft. As co-chairman of Navin.com, Bhatia will help guide the company's product development and strategy. Navin.com's current chairman Suhas Patil welcomed Bhatia and said his experience will make him an ideal candidate to co-chair the board.