...well apparently according to car and driver, here's whats NOT going to be on the production models:
"This car is dolled up with a few SEMA-style tweaks that will not make it into production. For example, if you like the 20-inch wheels, tough nuggets. They won?t make the cut. Ditto for the ride height (production will be about a half-inch higher), the paint color, the hi-po brakes and painted calipers, and most tragically of all, the lovely two-tone leather interior. An available sport package will include alloy pedals and a leather-trimmed steering wheel and shifter, but the leather-wrapped dash is a show-car one-off. So sorry."
http://www.caranddriver.com/autoshows/12462/2008-pontiac-g8.html
goddamnit!