Visual Studio extensions for SharePoint - Developer User Guide

I was engaged in a SharePoint workflow project recently, so I prepare and boost my learning in SharePoint technology. I got new laptop and VS2008 (excited), but then I heard that the extension for VS 2008 will only be available in June 2008 (Today is still May!)

So I install VS2005, the extended SharePoint tool and the following "mandatory" components:

• Visual Studio 2005 extensions for .NET Framework 3.0 (Windows Workflow Foundation)
• SharePoint Server 2007 SDK
  

Of course, I need to check out the user guide of VS extension that just released yesterday.

Please feel free to drop me any useful resources or website so as to fasten my learning process. :)