Speaking of original Turing Test, the Wikipedia page has an interesting discussion of the tests proposed in Turing's original paper. One of the possible reads of that paper includes another possible variation on the test: play Turing's male-female imitation game, but with the female player replaced by a computer. (If this were the proposed test, I believe many human players would want a bit of advance notice to research makeup techniques, of course.) (Also, I'd want to have 'all' four conditions represented: male & female human players, male human & computer, computer & female human, and computer & computer.)