SimplyEvents is a social calendar that will let you share all your future activities with the contacts you have on Facebook, Twitter and basically any site that has any kind of social relevance.
The idea is that by doing it they will not only let their friends know where to find them when the time comes, but also raise awareness as regards that event. Which is greatly useful if the event they are attending is one they have created themselves, of course.
And in true Foursquare fashion, users of the site are rewarded for their participation and involvement. Whenever they check-in to any event that they have announced they were attending on the site they will earn virtual stickers. And when a certain number of these have been accumulated, rewards will be unlocked.
In this way, something that has always had a fixed value and role such as events are put into a whole new light. It is not that they become an outright social currency, but they come pretty close.
SimplyEvents.com In Their Own Words
Connect through events.
Why SimplyEvents.com It Might Be A Killer
A platform like this one is interesting for the reason that (if applied right) it can turn any event into a true social phenomenon.
Some Questions About SimplyEvents.com
What kind of integration with Google Calendars is provided? 
