Anyone interested can register for free here: http://bigas2hack.eventbrite.com/. You are required to select whether you will work on the short-term or long-term challenges.
Registration is NOW OPEN for the long-term challenge.
Developers can work on a short-term challenge during the event time frame. Registration for this challenge opens on AUG 12.
During registration, choose server platform(s) for the long-term or short- term challenge, for the description of the available server platforms check http://rice-hackathon.irri.org/resources