Regrettably the workshop has been cancelled.
The number of registrations has not come close to the number needed to cover the workshop's expenses, and I can't imagine getting enough registrations in the next two weeks or so.
Those who registered will receive a full refund by mail.
Check back periodically, however. Centro Ecológico Akumal plans to hold a workshop on sustainable construction in November. I'll post the details when they become available.
I might plan another workshop on green homes when the global economy settles down.
If you live in the U.S. and want to take renewable energy courses, you could check the workshop schedule for the Midwest Renewable Energy Association (MREA).