Hi,
I would like to announce that I have completed the first version of reminders local plugin which is developed under Google Summer of Code 2012.
Now it is ready to be tested and I am expecting any volunteers to test this plugin on a Moodle server and let me know any bugs/features/feedback. This testing will be really helpful to succeed the future implementations of this plugin.
You can find out features supported by this plugin in the developer documentation: http://docs.moodle.org/dev/Email_reminders_for_calendar_events
You can download the plugin from this location: https://github.com/isuru89/moodle-reminders-for-calendar-events
and,
You can give feedback to here http://tracker.moodle.org/browse/CONTRIB-3647
-Regards