IT DOES not have the high-street resonance of a Nike, a Pepsi or a Windows. In its unglamorous but lucrative niche in the bank back office, however, FLEXCUBE is the brand of choice. According to rankings published in March by International Banking Systems, a trade journal, it is in fact the world's best-selling banking-software product. Its owner, i-flex solutions of Bangalore, is one of India's software success stories. Some even argue that it points the way forward for the whole industry: let it emerge from the shadows where Indian techno-coolies beaver away writing code that is sold in an American...