Days ago a friend showed me how after calling a restaurant (just a number) for doing a reservation and later the contact list displayed the name of the restaurant and an image of it.
Cool, right? Joe and Foo love this feature, but do not know the implications of it: a query is sent to Google asking for the info on a number (one must presume, tied up to your account id). Google now knows which numbers you are calling. and, Assuming they do this just for restaurants (how would they know, the query is sent anyways), they might even know your food preference.