The migration of the tinyos-2.x source code to http://code.google.com/p/tinyos-main/ has been completed. Please follow the instructions at http://code.google.com/p/tinyos-main/source/checkout for accessing the new repository.
We are in the process of migrating the tinyos-2.x repository to Google Code (http://code.google.com/p/tinyos-main).
During the migration, the write access to the existing tinyos-2.x repository on SourceForge will be disabled.
Thank you for your patience!