Attend an event
Should be nice to see who is attending an event when you open an event via the Events Webpart.
I see this as more than a Nice to Have. I think that Events need to be like Facebook events where you can invite people and see who is 'Interested', 'Going' or 'Cannot Attend'. As the organiser it is really important to know how many people are planning to attend your event - and as Attendees it is nice to see who else is going.