Update to a post I made a couple weeks ago: Dr. Fuz Rana from Reasons To Believe has a short podcast commenting on the human-hobbit research that you might want to check out.
"Tiny Palau Skeletons Suggest "Hobbits" Were Dwarfs," Science News Flash (March 12, 2008).
There are a series of related discoveries in addition to the one I reference in an earlier post. Dr. Rana covers them all. I found this discussion very helpful. He explains things in a pretty clear way. Enjoy!
UPDATE (4/24/08): Dr. Rana has a Today's New Reason To Believe entry for today talking more about the "hobbits": "Were the Hobbits Cretins?"