Microsoft Code Name "Acropolis" Community Technology Preview 1
http://www.microsoft.com/downloads/details.aspx?familyid=72386ce5-f206-4d5c-ab09-413b5f31f935&displaylang=en&tm
Microsoft SDK for OpenXML
http://www.microsoft.com/downloads/details.aspx?FamilyId=AD0B72FB-4A1D-4C52-BDB5-7DD7E816D046&displaylang=en
June CTP of SQL Server 2008
http://www.microsoft.com/sql/prodinfo/futureversion/default.mspx
Sandcastle June CTP
http://www.microsoft.com/downloads/details.aspx?FamilyID=e82ea71d-da89-42ee-a715-696e3a4873b2&DisplayLang=en
MOSS Add Ins:
Excel 2007 Add In: Synchronizing Tables with SharePoint Lists
http://www.microsoft.com/downloads/details.aspx?FamilyId=25836E52-1892-4E17-AC08-5DF13CFC5295&displaylang=en