As might tell by now the Exchange documentation team is a busy one. See below Technet article updates for Exchange Server.

The following topics are new: 

-      Welcome to Exchange Server 2007

-      Exchange Server Analyzer articles (102 topics)

-      Microsoft Exchange Server Intelligent Message Filter v2 Operations Guide (7 topics)

-      Exchange Server 2003 Coexistence and Migration for Lotus Domino Mail (5 topics)

The following topics have had major updates (for example: procedures changed, support policies changed, best practices guidance changed): 

-      Exchange Server 2003 Coexistence and Migration for Lotus Domino Mail (23 topics)

-      Migrating from Lotus Notes to the Microsoft Collaboration Platform (5 topics)

The following topics have had minor updates (for example: spelling errors corrected, URLs updated): 

-      Exchange Server Analyzer articles (11 topics)

-      Application Analysis Envisioning Process (1 topic)