observing.js

var query = SC.Query.local(MyApp.Record);
var data = MyApp.store.find(query);

// old way
var f = function() {
  if (data.get('status') & SC.Record.READY) {
    data.removeObserver('status', this, f);
    // ...
  }
};

data.addObserver('status', this, f);

// proposed way
data.addFiniteObserver('status', this, function() {
  if (data.get('status') & SC.Record.Ready) {
    // ...
    return YES;
  }
});

I like the proposed way... esp after writing tons of nodeJS code :0)