As an organizer and attendee of events on Upcoming, I noticed a big user experience flaw when it comes to sending notes through Upcoming.org. The problem is that when a note is sent to the attendees of an event, the email that is sent to the receiver, does not include the event that the note belongs to. 

Many organizers don’t realize this either, which means that I often receive notes of which I can only barely figure out where they belong to. 

Luckily, Yahoo has a suggestion board, and I posted this suggestion there to get it added. Maybe you can help this good cause and vote for it?