The Kinect is now $109.99 in the US, down $40 from its launch price. That's two copies of Child of Eden and change!
Microsoft's Larry "Major Nelson" Hryb also announced unspecified price reductions for the rest of North America, along with Latin America and Asia Pacific regions, effective today. The price will drop (again, to an unspecified number) in Australia and New Zealand on October 4.
There's no price change for EMEA regions or Japan, though nobody in Japan would notice either way.