A growing number of entrepreneurs are seeing — and seizing — the opportunity to apply for-profit technology models to pressing social and environmental issues, from health issues in the developing world to green products in the U.S. A new breed of angel investors and investment firms alike are ready and willing to take a gamble on some of these companies. On Oct. 13-15 in San Francisco, The Social Capital Markets Conference 2008 will bring together entrepreneurs and investors like these, committed to the “doing well by doing good” mantra. GigaOM readers are invited to take part in the action. Register with the discount code SOCAP20 to receive a 20 percent discount on tickets.