There have been a number of threads lately with users asking how to create a shared login system with Blesta. That is, how to log a user into Blesta from Joomla, or Wordpress, or some other system.
Since the plugin to do such a thing is so simple, we decided it'd be best if we just create the plugin. So I spent the last 45 minutes or so working on it, and it's about 90% complete. It just needs the management capabilities to configure the shared secret value from within the plugin management interface, and a little more testing.
Look for it on Monday, November 25.
UPDATE: The plugin is now available. Extract to /plugins/.
Documentation on using the shared login plugin can be found here.
shared_login.zip