It's done with about several different images. With a special program, or some extreme photoshop skills, you can achive that effect by skewing the images. The method has some retarted long name that I can't think of right now.
Attention! This is what the guy did. On the CWX wbesite there is a 360 degree view, www.crankworx.com/whistler09. He took all that and assembled it together, resulting in a spherical appearance.