According to the man himself, Michael C. Hall would be open to a Dexter spin-off of some sort if he was approached by Showtime. While on Bravo's Watch What Happens Live, Hall said,
"As far as a spinoff goes, it's hard for me to imagine what that would be. I couldn't come up with that idea. If someone does, I'll look at it. But it's tough to say. ... Maybe I could have cameo appearances on a show called 'Masuka.'"
The question is... would a Dexter-only spin-off be set in a lumber camp? Only time will tell!
(Courtesy of Arrow in the Head)