Was working on my Pirates build and I thought "How awesome would it be to have a large Rowboat that had a mounted Pirate cannon to the back?"
Pretty awesome... I'm thinking it could be a larger boat with a larger and raised back end, that is where the Pirate Cannon could sit. It would obviously be able to fit more people being larger, but I think the best way would be for the Driver in front with 1 passenger on each side in the back to seat 3 more people (plus the cannon shooter, obviously) Possibly a passenger or 2 that could sit UNDER the cannon?
could look like this :)

Edit: Heres some pics of a demo boat I built.


Also, Treynolds told me he was modeling this, so we really just need a scripter (providing that his boat doesn't suck ;P)