if you think that the Cooper S or the Cooper Works program isn't enough for you, RevoZport takes care of you. They have recently revealed plans for both the Coupe and Roadster models.
The program involves exterior tuning, with kevlar over fenders, front/rear bumpers, carbon roof and a proeminent spoiler. Revised side skirts and a vented hood. All in all, this shaves 30kg off the weight and widens the car by 15mm.