Regards from Germany, Jan
I don't do Facebook logins on 3rd party sites, but the landing page looks nice.
But, I feel it can be expanded to encompass anything you wish to do with friends where you can publicly list goals, add photos from each accomplishment etc etc with friends and family.
I don't like when apps use Facebook as a prerequisite, but I would find a way to utilize Facebook's reach without requiring it to participate. Use it as a tool - not as the foundation.
It's a concept, needs some refining - but there's promise.
Like masnick, I don't really use Facebook logins unless I absolutely must (AND it's blocked at work).
I'd remove the "test test test" goal :) . Maybe you can pre-populate from the best-known bucket lists?
But if you guys are stuck on the idea, I'd take out the big block of text that reads: "What if on December 21st 2012 the world really came to an end?"
and replace it with something a bit more to the point about what you guys are doing.
Also, a lot of people are fed up with this end-of-the-world thing and might be somewhat turned off that you are using it as a theme for your product description.
Also, you probably want to think about how you are going to change the punch line post Dec 2012 :)
Enough value for what?
Good luck on the app though.