dav_ recently announced the release of a simple toon character and rig on Blenderartists. He describes it as having basic controls and says that it is a work in progress. Because it is a work in progress, dav_ would like to hear any feedback you may have.
Find out more about the rig at dav_'s blog.
And you can leave you comments to dav_ at the Blenderartist's thread about the rig which can be found here. See below for a quick demonstration by dav_ of the rig's capabilities.