I've been waiting very long time to see that, and here it is, a completely updated version, designed to integrate with the latest .NET features, much improving on features that already existed, and providing even more robust functionality for use with
Windows Azure, WPF, WCF, and ASP.NET. There are very few other frameworks so mature and well designed.
It'll take me some time to get up to speed with the new features, but as with previous versions, that time is well worth it. After a quick evaluation I'm gonna introduce it to my team for use with next major releases of our products.
Thanks, Patterns and Practices team!