Google announced two Google Glass hackathons for NY and San Francisco. The two-day event, called Glass Foundry, is for Glass pre-order holders and developers in the Explorer program. Hackers will be given a device to use on-site. They’ll have an opportunity to explore the Mirror API, which has the ability to exchange data and interact with the user. Google engineers will be on hand to help developers. Registration ends Friday, January 18th at 4pm. The NY event is scheduled for February 1st and 2nd at Google NY.