A "friend of Colby" pointed me to this article in the Bay Area Reporter about a potential Colby Doppelganger and fellow porn actor, Logan Slash.
"Logan Slash is nearly a twin to better-known Colby Keller, if not actually (as I think) Keller with a nom de porn. He does it with Phillip Aubrey, who's not as turned on as he can be. Perhaps they're reined in by doing it standing up in a hallway; still, they flip each other, and the scene ends with Slash/Keller opening his jaws wide for Aubrey's load. "
Hmmm....see for yourself in this trailer for the Lucas Entertainment movie, Lust. Nom de porn? Love the concept, but trust me, I ain't had any work offers lately. Poor, poor Colby! :(