Latest version of the SharePoint SDK available on MSDN

Browse/View the SDK in the MSDN Library: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/spptsdk/html/SPSDKWelcome_SV01017094.asp?frame=true

Download the SDK: http://www.microsoft.com/downloads/details.aspx?FamilyID=aa3e7fe5-daee-4d10-980f-789b827967b0&DisplayLang=en

– 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    Search        o    Enterprise Application Integration