Basically the guy has very sound and rigorous methodology, and has achieved higher-than-random-chance results (to the tune of a mere 53% correct guessing based on variables in one experiment involving hidden erotic pictures.)
I personally am extremely skeptical. If we did discover something like ESP is possible, it would be the biggest discovery so far this century. It would open up possible consideration of religion, and all those people who claim to astral travel, could any of that stuff be real? It would be cool and scary. But naw, it's got to be bullshit :-)