Yeah, pretty neat.  My '07 FJ had this from the factory too.  I saw a tractor once that had a PTO driven generator that could power a whole house HVAC and all.  That remains my favorite.

A neat story, and speaking of Texas, in Corpus Christi there's a decomissioned aircraft carrier the USS Lexington that now serves as a museum.  Great museum if you've never been.  There is a story though about a time there was a massive power outage on the west coast and they used the generators on the ship as a floating power plant.  Those steam turbines are pretty amazing.