Aha.. cool.. I see the map now!
Another suggestion: Coordinatr would be a great app if all my friends were regular users. However, I am guessing that a lot of people would rather use their regular scheduling tools (Google Calendar, Outlook Calendar) to keep track of events. Those calendars don't have as rich a feature-set as coordinatr but are still the first point of schedule tracking. Anyway, my point is: coordinatr can really set itself apart by somehow integrating with these calendar systems (something like how xobni attaches itself to Outlook, but something simpler)!