A colleague just emailed me a link to the SharePoint Team Blog on which a multi-tabbed spreadsheet was posted with a comparison of features of current SharePoint technologies (Windows SharePoint Services 2.0 and SharePoint Portal Server 2003) with those in the upcoming Microsoft Office SharePoint Server 2007.  You can find the blog post at http://blogs.msdn.com/sharepoint/archive/2006/10/17/microsoft-office-sharepoint-server-version-and-edition-comparison-includes-wss.aspx and the actual spreadhseet can be downloaded directly from http://download.microsoft.com/download/1/d/c/1dc632e8-71e1-466f-8a2f-c940f1438e0a/SharePointProductsComparison.xls

If you are interested in SharePoint technologies, you should definitely put the SharePoint Team Blog on your list of favourites.  Those local to the GTA (and surrounding area) should also check out the Toronto SharePoint User Group as a great way to learn more about SharePoint and exchange tips and tricks.