Would be great to easily insert a calendar invitation for an event or webinar in your mailing. Right now we have to do this manually and create a calendar invite in iCal, Google, and Outlook and insert them one at a time into a mailing. Would be great if this was a pre-built feature that took care of all the different calendar types for you. Just create the event details and specifics and insert into a "Add to calendar" link or button.