The thing about it being mounted on the steering wheel or not, if you look at the F1 steering wheel the paddles are mounted on the steering wheel and move with the wheel:
While we're not exactly copying F1 technology, you have to keep in mind, that if you're driving and shifting in the middle of a corner where your hands are crossed, if you're approaching anything near the limit of grip you will spin the car because of the temporary disconnect of power that will result in a short burst of weight transfer, thus result is almost like a lift oversteer. You should, in practice, NEVER shift when the wheels are not relatively straight anyway. Therefore, where the paddles are mounted is really an issue with style and semantics.
Our goal with this kit is to provide you a better ergonomic option to the factory tap-shift, while making it easy enough to install so you don't have to remove the airbag and steering wheel to install, and make absolutely no modifications to the factory hardware and still maintain the tap-shift feature. There'll be nothing to cut, nothing to drill, nothing to remove except for two small screws and replace with our longer screw and mounting hardware.
Test fitting on an actual car in about a week, and as soon as we can confirm all the changes will clear all the operating hardware, we'll go to production and hope to have these in by first quarter of 2011, probably shortly after the new Hurst Comp Plate and Sticks are available.