Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.
Yesturday Microsoft announced the Visual Studio 2008 version of Visual Studio extensions for WSS (v 1.2). It is available for download now! This took me by surprise as I thought it was scheduled for next month - but earlier is better!
Also, checkout the spunky new site for SharePoint developers: http://www.mssharepointdeveloper.com/. This is a great central resource for getting started with SharePoint dev. It contains a bunch of FREE learning material - 10 Virtual Hands On Labs to be precise - and links to other goodies.
FYI: A gang of kiwi's were heavily involved in creating some of this material, including myself and some other's at Intergen and of course Paul Andrew.