For those who attended Tech Ed 2006 and managed to get a copy of 7 Development Projects For Microsoft Office SharePoint Server 2007 and Windows SharePoint Services Version 3.0 make sure you read the introduction. page xix in the intro you will find a section on KnowlegeLake including images of our capture product, Imaging List Template and Imaging Viewer all running on WSS 3.0.
For those of you who did not make it to Tech Ed 2006 or did not manage to get a copy Microsoft has made it available in pdf form: 7 Development Projects For Microsoft Office SharePoint Server 2007 and Windows SharePoint Services Version 3.0