Cam regrinds for Atkinson cycle?

[omgwtfbyobbq]

I stole this from vwdiesel.net and was wondering if anyone here had thought about it. On SI, it'd much easier to implement than diesels, since starting doesn't depend so much on CR, and having a longer expansion ratio than effective compression ratio allows for better thermal efficiency. The torque curve, and power, would drop proportionally to the decrease in effective CR, but I think it may be worthwhile. Kinda like how gearing is good for an effective increase in mileage at the cost of acceleration/power in that gear, this would be good for mileage across the board at the cost of peak torque across the board. Nice for someone who does a lot of city driving.