The updated WSS 3.0 Evaluation Guide is now online. You can view the landing page here: http://www.microsoft.com/technet/windowsserver/sharepoint/techref/techguide.mspx

The direct link to the guide is: http://download.microsoft.com/download/b/9/e/b9e27997-7a8e-493c-b23b-58eeaa3214c8/WSSGuide.doc

And in case you missed it, WSS Developer eLearning recently became available @ https://www.microsoftelearning.com/eLearning/offerDetail.aspx?offerPriceId=119608