Tweet your Google Calendar event (e-mail) reminders
This recipe allows you to post reminders to your Google Calendar events to your Twitter account. In order to use this properly, you must first specify the time interval you'd like for Google to e-mail you the reminder for your event (e.g. an hour before, 1 day before, etc.) In the "Search For" field of the Gmail trigger, substitute your actual Calendar Name in the 'subject:(Calendar Name)' search operator.