If the film Islander comes to a theater near you, by all means go see it. It's about a lobsterman who lives on the island of Vinalhaven, just off the Maine coast. His headstrong ways about keeping mainlanders from lobstering near the island lead to a terrible accidental death. After he gets out of prison, he has to try and pick up the pieces of his life on Vinalhaven.
In general, the cast did an okay job of imitating the coastal Maine accent. My lovely wife Rowan put it best in noting that they tended to drift in and out of it a bit, and that if they had indeed gone for a true island accent, subtitles would have been necessary, even for many Mainers.
The movie was well shot for its budget, tho as a projectionist I was forced to give up trying to find a good focus spot. It just didn't stay in one place.