Mastercard has partnered with KingFisher and offers a complimentary Silver membership on all World credit cards, including HDFC through 31 Dec 2011:
https://www.kingclub.me/CRANE_IT_WEB...omo/promo5.jsp

Another offer you may be interested in:
https://www.kingclub.me/CRANE_IT_WEB...omo/promo1.jsp
(Although the eligibility requires an internationally issued Mastercard, you can generate a Netsafe card and use that to book your international return flight and get a complimentary Gold membership upgrade!)