There are several fun websites, all animated by one Brian Frisk.
The first one is quite relevant:
thefrown.com Angrybot is probably my fav, although SR and Robokopf come in a close second . . . and, uh, third, I guess.
Quite entertaining! Ever imagine Bigfoot and a Cowboy debating Gay Marriage? Well, now you will! and a homicidal hobo and a non-homicidal serial killer. Great fun!
and Hell on Earth (at http://www.extrabad.com/hellonearth/) is also funny, but not quite up to the standards of the other two.
A great way to blow some time. And great funniness!