Couple things...
Xbox 360 does pretty well in regions not tracked by NPD, Chart Track, GFK, or Media Create. This is especially true in what I call tropical areas - i.e. Latin America (Mexico all the way down to Chile) and the wealthier countries of South East Asia.
Our data runs further than NPD data, so our totals for the Americas are always going to be higher than NPD since they include hw sales for more areas - North & South America and since we have a longer time frame.
In terms of inventory, with the introduction of the $300 20-gig price point for 360 in the USA sales have increased for that model while inventory is getting phased out. The stores are somewhat loathe to take the new $350 model since a price drop is likely coming in early September, and since the old $350 model, not at $300 is selling better than it was before.
People are difficult to govern because they have too much knowledge.
When there are more laws, there are more criminals.
- Lao Tzu