Joe’s Adventures continues the prodigious crime drama of Mafia II through the eyes of Joe Barbaro, Vito Scaletta’s best friend, during the time that Vito spends in prison. The game add-on extends the original narrative of Mafia II by combining a dramatic storyline with intense arcade-style gameplay that opens up several new areas in Empire Bay and items for players to get their hands dirty with.
http://ve3d.ign.com/articles/news/57154/Mafia-II-Joes-Adventures-DLC-Announced
Opinions? My first impression is that it seems like this was intentionally removed before release only to be added in as 'dlc'...