Mike! Haven't seen you round here for a while, or am i just not paying attention?
If you go into the visor window of MAYA there is an example of a skeleton which can be used to practice rigging. It isn't that hard to do once you get into it.
If you want i can upload a model i extracted from a game?
so long as you are using it for practice and not for sale or money i think it is legal (don't quote me on that though) it is fully textured and i fixed up rigging problems myself.
also i think there are some rigged models on this site: http://www.turbosquid.com/3d