The latest release of the SharePoint SDK has seen some significant improvements, I know the content teams have been working really hard on these.
Browse/View the SDK in the MSDN Library:
– SQL Full-text Search Syntax
– Protocol Handlers Reference and Overview
– An expanded introduction to SharePoint Portal Server
– Expanded Concepts and Architecture section with new topics about
o Profiles and Personalization
o Enterprise Application Integration
So get downloading….and reading!