Google will be hosting a hackathon in San Francisco later this month, with the event being the 'next phase of the Glass Developer Platform.' There's a limited number of applicants, but it should be a good chance for developers to get their hands, or eyes on with the Glass unit itself.
Developers can get knee-deep in some Glass SDK, which will be like striking gold for developers. Once the Glass SDK arrives, developers will be able to build applications that both work offline, and have direct access to Glass hardware. We should be able to see much more in the coming weeks, with the Glass hackathon taking place in San Francisco on October 19.