Microsoft has announced that coming Spring (US) 2011 we will be releasing the Kinect for Windows SDK beta. Microsoft Research has released a website with more information including an RSS feed that you can subscribe to to get release announcements, updates, news and more. http://research.microsoft.com/en-us/um/redmond/projects/kinectsdk/
This is a really exciting announcements and will enable people to start to explore interesting solutions using the Kinect devices. We have already started to see some people (using a hacked API) build some interesting solution, like the Moscow Bank window display.