Google just hit our inbox with an email inviting folks who pre-ordered the Explorer Edition of Project Glass to two-day hackathons in San Francisco and New York, where they'll be the first group of developers -- not being paid by Page and Co. -- to collectively develop for Glass. Dubbed Glass Foundry, the events will introduce developers to Glass, set them up with access to the hardware and familiarize them with the API, called Mirror. Throughout the powwow, Google engineers will be on-hand to help out with development, and the second day will feature demos and "special guest judges." Hackers in San Francisco can look forward to the event on January 28th and 29th, while those in New York City can snag time with the device on February 1st and 2nd. Hit the jump for the full text of Mountain View's email.