Google Android Download Sdk

When OS Android, Google to be released?

I know that the Android SDK is out and available for download, so u can develop for Android, but when is the actual source code of the Android OS be released?

Now is rumored to be the operating system will be used for HTC Dream and a few others that come the end of this year. So I hope that this year should be available to us.

Android Developer Tips – StatefulDrawables, HierarchyViewer