In version 2.7.18 (Joomla 2.5 version), we added a robust auto email reminder and follow up feature!! Existing users are going to love this. Setup a cron job to trigger the emails. You create as many reminder emails as you need. Set the number of days prior to an event for the email to be triggered. This can also be a negative number so the email can be sent AFTER the event as a follow up! Nice, huh? Further, these emails will apply to all events unless you specify the email for a specific event. Even further, you can upload attachments to each of these emails.