I would suggest The Esprit Ironman in Montreal. I know it's not part of the Ironman Championship but it's still an Ironman. The swim is in the Bassin Olympique, the bike on the circuit Gilles Villeneuve (Formula 1), so completely flat without too much wind and the run is aroud the bassin. Great course for the spectator since they can watch your progress without moving much. Since the bike is 41 laps, you can have access at you bag often.
There might not be an easy IM but on paper, this one sure looks easier than others like IM Canada! I haven't tryed it yet but I will in september...
By the way, unfortunatly no slot for Kona.
Here's the link of the event :
http://www.esprittriathlon.com/en/guide.htm
Richard
"You're only young once, but you can be immature forever" - Larry Andersen