As promised last week, Nissan has just unveiled a Second Life extension of its campaign for Sentra. Here's the location's SL URL, and here are more details from Giff at Electric Sheep. I spent a few minutes on the sim before it went down as developers were apparently adding final touches, but here's what I saw:
A giant vending machine with very realistic action. The machine dispenses Sentras.
The car itself. Apparently customizable (although I am yet to figure how exactly) and driveable (ditto).
A decorative public bathroom. Haven't seen one before in SL, although this one was closed. Nice touch. There's also a driving course and a giant loop, but then the sim crashed so I don't have any pics.