I am writing this post from Windows 8 Developer Preview. You can get the bits here.
After a successful install and some time to ready myself to the new Metro UI, I have begun installing programs to put this OS to task. According to the Keynote at the Build Conference this week, this release was made public to test not just the new UI and to begin to create apps, but to test your current Windows 7 apps. That is the task for this week.