As mentioned in one of my previous posts, the automotive industry has started to take advantage of Silverlight. The most recent release is the Perfect Car Finder - Photo Edition from Kelley Blue Book. This has been written in Silverlight 1 and utilises DeepZoom technology.
Renault have also taken advantage of DeepZoom with their new Laguna Coupe mini site. This site was written using Silverlight 2 and demonstrates the high quality video Silverlight can offer.
BMW Germany was one of the first manufacturers that I know of to use Silverlight on a public facing website. http://www.silverlight.bmw-tv.de.axprod.net/frontend/app/Default.html
Aston Martin showed off their use of Silverlight and WPF at Mix 08 earlier this year.