I found this site.... I think I am going to give it a try, 15.5 feet with a 4 foot wide bottom, full deck with storage under and two pedisale seats....

Might use one of those jet motors from my other post.... be great in shallow or weedy water.   It would draw about 1/2" of water... of course the motor needs 4" to start....  what do you guys think?

http://www.unclejohns.com/jonboat/default.htm

I wouldn't want a wooden boat. You might as well just buy an aluminum one, but if you like to build things then go for it.