HULIQ News is an independent news site that compiles a weekly tracking chart of the top 20 individual video game SKU's, both software and hardware. In addition to the chart, HULIQ also provides analysis of the data to help put it in context.
For a sample of the chart, here are the top 5:
1. Just Dance 2 (Wii)
2. Donkey Kong Country Returns (Wii)
3. Kinect sensor with Kinect Adventures (Xbox 360)
4. Call of Duty: Black Ops (Xbox 360)
5. Epic Mickey (Wii)