I've read that Emery is the frontrunner, but I don't know for sure.
Problem for Emery is that he has been out of politics for close to a quarter-century. I'd tend to lean towards someone with recent legislative experience. Perhaps the horrible job Baldacci is doing, along with the rest of the incompetent 'Rats, might lead to a clean sweep for the GOP of the legislature and Governorship for the first time since John Reed won his final term in 1962.