It appears that Kinect will be priced at $149.99 according to Microsoft's very own online store. What this means for the the European market is still unclear, but chances are the unit will cost a similar price with exchange rate taken into account.
The $149.99 price tag will get you the unit which includes two 640x480 cameras that capture at 30 fps and four microphone array, as well as the power supply cable and Wi-Fi extension cable which is most likely for moving the wireless adaptor to fit along with the Kinect unit.
This price point does seem a little high, especially since it's about $50 higher than the predicted and hopeful $99.99 price tag. Aiming for the Wii market with a product this expensive is an odd way to sell the Kinect, especially considering the cheapest Xbox 360 currently costs $199.99.
Source: Microsoft Store