The guifi.net development is hosted at lafarga:
https://projectes.lafarga.cat/projects/guifi
The incident tracking can be fount at the TRAC:
trac.guifi.net
This code is still beta, however it runs :). Subscribe to the developers mailing lists to get more information and in contact with the team.
To get more information about the subversion, look at the
Examples:
To obtain the guifi.net modules for drupal:
svn co https://svn.projectes.lafarga.cat/svn/guifi/drupal6x/modules modules/
svn commit --username usuari --password pass --message "Tell here what you have changed"