Looks like they pulled a lot of the interior design features from the Aura concept, but I checked, and it is in fact unique from the Aura interior (I had my doubts/suspicions at first )
although the steering wheel looks toyota/new pontiac, and the gauges look a little closer to the solstice setup. in the respect that they are not as set in the dash as in the cobalt. the solstice shares it's gauge cluster with the cobalt.