for more evolution examples, look at the horse. from eohippus to the modern horse is a great example of evolution.
http://en.wikipedia.org/wiki/Evolution_of_the_horse
'popping a splint' is a term we've all heard. a splint bone is one of two ones on either side of a horses lower leg. it's the remnants of the horses other two toes that were once a part of the foot. the hoof is made of the same material as your hair and fingernails, and evolved from their toe-horses essentially stand on tip toe.
i took a picture of the back of a horses leg when in charleston-they have a full horse skeleton on display.
also, check out 'ashfall' in nebraska, a fantastic fossil site. we were taught in school that the first horses came to north america with the european explorers..
not quite.
among the remains at the fossil site are both one and three toed horses!
http://en.wikipedia.org/wiki/Ashfall
also camels and rhinos. there were rhinos here once upon a time. i hope to go there next year, along with a couple other sites in wyoming, i have the route mapped out on my work computer.