Seven San Quentin prison inmates recently presented tech startup proposals as part of the Last Mile program, an entrepreneurship course modeled on startup incubators that take in batches of young companies and provide them courses, informal advice and the seed investments to grow. "Live stream has gone mainstream. Mobile video usage went up and is expected to increase by 28 percent over the next five years," said Eddie Griffin, who was pitching a music streaming concept and is on a third stint for drug possession at the prison. Inmates can't run businesses from behind bars and have no access to technology aside from tightly monitored computer use. "I still have a lot to learn," Griffin said. "I've never used a cellphone."