This may have been posted before but just in case some people haven't seen the car yet here it is.
http://www.bungie.net:80/News/content.aspx?type=topnews&cid=12771
NASCAR Cometh
"A one-off Halo-themed NASCAR will take to the tracks in the Dover Nextel Cup series on Sunday the 23rd – a couple of days before launch. It’s going to be driven by David Stremme for Chip Ganassi Racing is covered in Halo 3 livery, as well as the usual plethora of sponsors. The cool part is that David Stremme is allegedly a real Halo fan. We’ll keep our fingers crossed that he wins."