It was fairly easy to implement, the only problem is that not many of the people I know have software which lets them RSVP too, therefor I also connected it to Facebook.
Most peoples friends and family are on Facebook, so the events management feature is useful there.
I can't convince my friends and family to use a social network if they lose the ability to organise and be made aware of events as part of the move.
And how did Facebook actually solve the chicken-egg problem you just referenced?
I'd love to get some citations for any of the federated social networking platforms-- Diaspora, Gnu Social, Mediagoblin, Mastodon, etc.-- that link to a carefully considered and workable plan for mass adoption that any of them carried out at any point in their history. For reference you can look at the Wikipedia entry for Facebook (hint: it involves universities and enormous amounts of money).
edit: remove redundant word
What the hell? That is the main feature required in a social network, after the ability to see each others comments. People want to organise their lives using the graph that their social network provides.
Is anyone aware of a distributed or federated open source social network which provides event management functionality? I would love to hear about it if you have... Gallery functionality would come in handy too.