His name is Nick Nude. He doesn't seem to have done much aside from the Melissa Doll material (the girl on the right at the beginning of the vid), but they do have several hot scenes together -- one of which takes the form of a "competition" of sorts between Melissa and another girl to see how much of a pounding they can take. It's not quite as hot as it sounds, but it's still good.
The guy does have a huge cock, don't get me wrong, but it's exaggerated a little bit in this vid -- and others with Melissa -- because she's such a tiny girl. I doubt she's cracking 100 pounds.