I agree. I am a total sucker for purpose built equipment. The teardrop driver's side window is a particularly elegant piece of work.
I ran across a picture of the LaBatt's Beer Streamliner and I instantly fell in love. I miss the idea of delivering a single product in style - a transport with a single purpose. Perhaps this is the Canadian "Budweiser Clydesdale." I just wish I could witness one in the wild.
Great B&W picture: http://i.imgur.com/B0niN.jpg
Lots more information through the usual avenues.
Labatt Streamliner Beer Truck (Thanks, Robert!)