I just stumbled on this site while wandering around on Gawker.com. Michael Jekot is an artist that does paintings of classic sports and racing cars, as well as "man and machine" paitings that show the passion we all have for cars. And it seems he's a bit of a Porsche nut too.
Check it out here:
http://www.reconstructions.com/
These are my favorites:
http://www.reconstructions.com/gallery/man/paintings/concoursstrategy.html
http://www.reconstructions.com/gallery/race/paintings/ultimateweapon.html
http://www.reconstructions.com/gallery/classics/modern/paintings/simplyred.html