From the site after you enter your email address:
You can be one of the early adopters of Radoop, an easy-to-use interface for Big Data analytics and machine learning over Hadoop!
Invite some friends using the link below. The more friends you invite, the sooner you’ll get access!
You know, I’m not really interested in sharing data, contact or otherwise, about my friends. So I may be missing the next big thing, but so be it.