Guys Enterprise Library 3.0--April 2007 is out .
This release of Enterprise Library includes: Caching Application Block, Cryptography Application Block, Data Access Application Block, Exception Handling Application Block, Logging Application Block, Policy Injection Application Block, Security Application Block and Validation Application Block.
Download it from :
http://www.microsoft.com/downloads/details.aspx?familyid=62ef5f79-daf2-43af-9897-d926f03b9e60&displaylang=en