Penny would love to see a hamster learning to do an agility course, as I saw in a video at Itchmo. (Of course, Penny would love the hamster for a different reason than I would. It looks just the right size to go down her throat without chewing.)
I think I once read that most if not all of the domesticated hamsters in the world are descended from one pregnant female who was brought from Syria early in the twentieth century. The Louisian Veterinary Medical Association site suggests that this is true, though from reading it I'm not sure whether other species of hamsters have been bred into the line over time. It seems that they would be incredibly inbred if they all descend from one litter.
Another site about hamsters, in Washington, says that most laboratory hamsters are descended from that one litter but refers to Chinese,
European, and Hungarian, Russian or Siberian hamsters.