Enterprise Library 3.0 December 2006 CTP is out!
Enterprise Library 3.0 first CTP (December 2006 CTP) is available at http://www.codeplex.com/entlib.
This CTP includes a partial implementation of the Validation Application Block, Application Block Software Factory, Visual Studio-integrated config tool, DAAB enhancements and more.
You can download the CTP from here. You'll also find the release notes for this CTP in this page.
Enjoy!