Apple has integrated Facebook (and Twitter) to some degree into the iPhone, mainly by making it possible to sign into the services as part of its basic settings and to share almost any content to them easily.
The most prominent feature of this new model is its Sidekick-like form factor, although the U140 eschews the swivel screen for one that slides up to a 30-degree angle at the touch of a button -- all the better to watch programs from its integrated satellite DMB receiver (complete with TV-OUT).