So two programs that I have been working on for quite some time were announced at E3 2010, and just today the pricing of these programs was announced.
The newly redesigned Xbox 360 250GB Console retails for $299. The just announced Xbox 360 4GB will retail for $199.
Additionally, the controller-free experience Kinect (which used to be Project Natal) has been announced at $149 with the game Kinect Adventures. It will also come in a console bundle with the 4GB Xbox 360 for $299.
Lots of games for Kinect were announced at E3 as well. The one that most caught my eye from the Microsoft E3 Media briefing is Dance Central from Harmonix.