So it would seem like this ones been beaten to death more than a few times, but alas, we'd all like to see it work.
In reading through this a previous poster had suggested that a 2 tooth increase in the rear sprocket would take up the slack needed to totally eliminate the whole belt-tensioner problem. However, then another problem arises due to lack of clearance on the swingarm (the front I assume).
What about offsetting the gears the 3/8" or so ...