There's your million dollar idea, Dave! Asymmetrical tires for hella flushness. :D

It is a good idea, though I think someone beat me to it... http://www.freepatentsonline.com/6786260.html
Thinking about it more, this would negate the fact that you have a tire to mimic the negative camber that the car is set for. Correcting the tire to make its 'face' square to the road, or fix the camber to 0 - so i'd guess that it may perform the same as if there was 0 camber.

I've got the rear camber to ~0.7 degrees now, used a half inch drill bit and made the outer mounting holes on the upper control arm mount oblong (put the drill in like it was the bolt and pull the assembly outwards to elongate the hole).
This has not helped the feel of the rear tires, though I hope they will wear more evenly now.