Ask HN: Good examples of Facebook API implementation?
If you've hacked up something using the Facebook API in a cool or interesting way, put up a link and maybe an explanation.
I dont know if this counts as interesting but I said I would post it anyway. We (http://www.youtipit.org) have a feature that allows people to tip Facebook members with bitcoins and the recipient can claim them at any time by registering with their Facebook account. Its just basic OpenAuth/Graph code but it works well all the same. The cool thing here is that you can reward someone (eg a friend, a band etc) without them even knowing about you or bitcoin. Unfortunately it does not work for Facebook pages... only profiles.
I too would be interested so see other interesting FB Graph uses, I bet there are some pretty cool ones out there.
(This is my first post to HN, take it easy on me :-)