Single invite, multiple slots
Many times, people in my organization will run the same meeting at multiple times to accommodate overseas employees or offer different time slots etc. To do this, he or she has to send out multiple invites for each separate slot (just today, I got six separate invites for six separate timeslots for the same meeting!). My idea is that a user could send out a single invite with six separate time slots in the invite. Each slot would show tentative on the user's calendar until he or she accepted one (or more) of the slots then the others would be removed from the calendar (or he or she could decline all instances). Single invite with multiple times opportunities to attend.