OK. Heres my idea.

1: Random page. The banner can not be changed by a random image script, because it is not all one image is it??

2: There is a site I found a while back, in which you could choose the lay out you wanted. So mabey you could put something under the header, links to other layouts. Then someone could right a script, that remembered which one you chose, and always use that header.

I think some sort of car is needed like Muchroomgod submited. Also, wouldn't something to do with a 3d cube be most proper?