Apparently, famous identity-theorist U.T. Place's brain is preserved at University of Adelaide.  See here.  You'll notice that it's left hemisphere (right facing you) is huge compared to it's right.  Is this some evidence for the old logic and language in the left-brain idea (assuming Place was quite logical—and perhaps not so artistic?).  For comparison, here's Einstein's more symmetrical brain.   (I think he played violin, right?). 
David Chalmers has a link to interesting show on identity theory here.