Very interesting. If everyone submits a couple of times or even ranges of times when they are free (I'm free Friday between 10am - 2pm except an hour for lunch) then you could use schedule.js (<a href="http://bunkat.github.io/schedule/" rel="nofollow">http://bunkat.github.io/schedule/</a>) to automatically suggest the best date and time that works for everyone (sort of like how the newest version of Outlook works).<p>If you had access to everyone's calendar, you could automatically suggest all available times instead of needing people to propose times and end up with exactly what Outlook does.