Ember.js: access property of a belongsTo relationship

readme.txt

I have two models with a one to many relationship. An Account can have many Interactions.
I want to create a computed property on the Interaction which observes a property on the
"parent" model, Account. When I load the page, the provider method triggers, so it seems
as if it's "working" but when I do a log statement in the function I get nothing.

Should I expect to be able to access the other model in this relationship like I'm doing?
Is there a better way? Is this a bug?

Dependencies:
DEBUG: Ember.VERSION : 1.0.0-rc.4
DEBUG: Ember Data VERSION : r13
DEBUG: Handlebars.VERSION : 1.0.0-rc.4
DEBUG: jQuery.VERSION : 1.9.1

models.js

Social.Account = DS.Model.extend({
    username: DS.attr("string"),
    provider: DS.attr("string"),
    interactions: DS.hasMany("Social.Interaction"),
});

Social.Interaction = DS.Model.extend({
    text: DS.attr('string'),
    account: DS.belongsTo("Social.Account"),
    provider: function(){
        console.log( this.get('account') );
    }.observes('account.provider'),
});

Did you ever figure this out? I'm wondering the same thing.