I think it's a Heckler... here's why...
I'm going with Indy on this. He called the new Bullitt, too. Beyond that...
1. The new Superlight was just released (December, 2006). Why release yet a new version already? Dealers wouldn't be able to sell the stock that they JUST ordered.
2. In Indy's pic (below, right), the bike's top tube has a subtle Nomad-esque curve as it meets the headtube. The down tube has a little curve, too, possibly for more fork clearance. The Superlight has straight tubes. This, too me, jumps out as the most obvious difference. The bike on the right is specced with a Van32. The Van32 is not an option on the Superlight's bike builder on the SCB site. Also, looking at the tubeset, I'd say the bike on the right has fatter tubes. Also inline with a Heckler.
L - Superlight R - Heckler
3. The rear triangle on the Heck (picture 2 below, left side) looks thicker than the Superlight's. Also, note the Superlight's non-drive side chainstay. Notice how it is offset down from the drive side chainstay. There is daylight between the two stays. The Heck's are much more parallel and they line up on the same horizontal plane, mostly, until the dropouts. I realize that this could be an effect of the angle that the picture was taken at, though. The Superlight picture is taken centered. The Heckler picture is taken a tad above and a tad in front. There are other more subtle differences in that rear triangle, too.
L - Heckler R - Superlight (sorry, reversed the order)
BTW, my wife, who isn't a bike person, spotted several of those differences immediately.