I joined the Kulula Jetsetters club on the 31st May 2008 (quite easy to do - navigate to www.kulula.com and type your details in). Members of the Jetsetters club earn "Kulula Moolah" every time they book a flight. Just like the Kulula moolah one can earn by spending with the Kulula credit card, this Kulula moolah earned can be used to offset the cost of flight with Kulula (owners of the Kulula credit card earn bonus Kulula moolah if they are members of the Jetsetters club). There's no charge for joining the Jetsetters club, but you do have to be over 18 years of age.
Here's a copy of the Kulula Jetsetter email which I received on the 5th June 2008.

