they ran some promos with the cube at the tail end of the last season also, and a contest as well, i think. Like, where's the cube, and then they show a famous landmark. Also, they did the cross promotion at comicon with the heroes comicbooks they passed out, i believe there were four comics, with the cube on the front? bah. They're on eBay too.
I guess I was oblivious to Nissan in general until I got my Cube. I hadn't bought (or shopped for) a new car in twelve years. I hadn't noticed any advertising for any cars....the dvr lets you zip thru the commercials! (Gotta love it!). But now we find ourselves looking for other Cubes on the road (only one so far) and answering questions in parking lots, gas stations, and red lights!...........and so I was surprised and excited to see it on Heros.....silly me!