The car you see here (click the Read link for more pics) is likely the production version of the Bullitt Mustang we saw back then. A StangNet community member snapped these pics recently, and they suggest that the Bullitt will do away with any superfluous accoutrement like spoilers, louvers and hood scoops. Instead, it will be simple and plain, but more powerful than a standard Mustang GT.
Unfortunately, this little peek is all we get, so we can't comment on specifics except to refer you to a previous post on the Bullitt's leaked specs. The Mustang GT's 4.6L V8 should be producing 312 HP in the Bullitt thanks to a Ford Racing Performance Parts Power Pack, and suspension and brake upgrades are expected, as well.
We hope we'll meet the Mustang Bullitt again in person come January at the 2008 Detroit Auto Show, but until then we expect everyone in Motown to lift up any car covers you see.