Garbage Truckin' didn't make the cut. It was yet another thing cut by Paul Bertone, your favorite Bungie employee who also cut the Battle Rifle and Dual Wielding from ODST.
Here is Michael Wu at the PAX panel beginning to discuss his "hopes and dreams" for the Oliphant:
http://www.youtube.com/watch?v=dhr54txafQ8#t=7m15sWhich later is confirmed to be a cut feature that Wu had prototyped and Bertone even approved some dialog recording for:
http://www.youtube.com/watch?v=yh_HSoDmtvM&feature=channelTo be fair, they had a horrible deadline to deal with since ODST was allegedly a "hail mary" attempt to get a game out and not have to fire the staff who were attached to the failed Peter Jackson project.
They also discuss the failed attempt to incorporate a "Director's Skull". It stands to reason that the interview Staten did for OXM happened before this was cut. If so, the "pure fan service" that was supposed to be unlockable may have actually been cut.
Well, there's a depressing thought for the day.