Hands-On Labs for Enterprise Library 4.1 and Hands-On Labs for Unity Application Block 1.2 have been released few days ago; here is a the good opportunity to summarize some interesting links.

Enterprise Library: 

• MSDN - Enterprise Library site : http://msdn.microsoft.com/entlib 
• Enterprise Library wiki : http://www.codeplex.com/entlib/Wiki/View.aspx?title=EntLib%20FAQ
• Codeplex :   http://codeplex.com/entlib
• HOL Enterprise Library 4.1 : http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=ab3f2168-fea1-4fc2-b40c-7867d99d4b6a

Unity Application Block:

• MSDN - Unity portal : http://msdn.microsoft.com/unity
• Codeplex : http://codeplex.com/unity  
• HOL Unity Application Block 1.2 : http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=93a5e18f-3211-44ef-b785-c59bcec4cd6f

Pattern & practice:

• MSDN - Pattern & practice portal: http://msdn.microsoft.com/practices