August 19th, 2008 | Published in iGoogle
As a quick heads-up, we'll be pushing a new implementation of the persistence API to the iGoogle sandbox. When this happens, it will effectively clear the data storage of any OpenSocial applications in the sandbox. Data stored in preferences will not be affected, nor will any data of applications in production.
Enjoy the fresh, clean scent of an empty datastore, and let us know if you encounter any issues in the iGoogle Developer Forum.