1 Facebook just announced a new Open Graph "Like" action that will make it easy for developers to build Like buttons into their apps.
2 Interestingly, you can make the button look however you want, or hook it in to a "thumbs up" or heart icon you've already implemented in your app — ..
3 These actions create a full circle of interaction between Facebook and apps, but as of today, Facebook is no longer approving custom "Like" actions ..