I have been working on Author Alcove, a service to help you discover which books to read next, for the last year and a half. My immediate focus is on digging into the machine learning and algorithms side in order to improve the book recommendations. It’s not profitable at the moment, but active users are on the upswing and it looks like the numbers can be made to work.
I also run a small consultancy specializing in Python / Django at http://grokcode.com in order to keep the lights on while I work on Author Alcove.
Costa Rica is a nice place to live while keeping costs down (although not nearly as good as it was when I moved here from the US 9 years ago). There are plenty of beautiful beaches.
Glad to be here, and happy to answer any questions about Costa Rica, Django, my bootstrapped projects or anything else.