We’ve been trying to figure out what BSB is for the last couple of weeks now, and it has just been announced – Bharti Enterprises has formed a joint venture with Japanese co Softbank Corp to invest in ventures in three areas – Social Media, Gaming and e-commerce.

It’s a 50:50 joint venture, and what really interesting about BSB is that it is being led by Kavin Bharti Mittal, Sunil Bharti Mittal’s son, and the venture will look to build businesses focused on the mobile being the first screen. Atsushi Taira, previously SVP of International Business Development at SoftBank Corporation is the CEO of the venture, while Kavin Bharti Mittal Heads Strategy and New Product Development at BSB.

We first learned of BSB via a tweet from Mittal, stating that he is hiring UI designers in Delhi. He has experience in building consumer focused businesses – his company AppSpark launched two applications:

Movies Now, an application which allowed the purchase of movie tickets, covering 11,000 screens in the US, and 3000 screens in Canada. according to its website.
Foodster, an application with food recommendations, based on foursquare check-ins. Read a review here.

We don’t know which products BSB will launch in India yet – the announcement offers no hints, but we’ll keen an ear out for more. Leave us an anonymous tip, if you know.