J.B.
Yep I agree with ReverendRuby...perfect use of FB. Someone can create a group page that those who want to participate can join. You can make it closed (an administrator or fellow page member can approve requests to join) so the whole world can't see what you're planning and talking about.
I think snapfish or shutterfly used to have a social media component but honestly, it's not as simple and seamless as FB.