Microsoft Enterprise Library is out...
Microsoft's Patterns & Practices has launched a consolidated library of all Application Blocks along with Source and Unit Tests. I still remember guys from Microsoft User Group, Hyderabad (MUGH) asking a question to Sandy Khaund, Group Product Manager, P&P, on consolidating the application blocks and publishing them as cool examples for various patterns implemented and well documented. That was well heard by P & P guys i think :-)
MSDN Article about Enterprise Library
GDN Workspace for Enterprise Library
This release of Enterprise Library will include the follwing Application Blocks (From MSDN)
Caching Application Block Configuration Application Block Data Access Application Block Cryptography Application Block Exception Handling Application Block Logging and Instrumentation Application Block Security Application Block