I know it had lots of retailer bundling going on in 2006/2007, but NPD counts those as sales. It's only manufacturer "in the box" bundles that NPD doesn't include in their software totals... did MotorStorm have that in the US? I know it did in Europe, but I'm not sure about US? :/
Motorstorm was bundled for over a year with the 80GB systems.