You maybe already know Yung Chou from Microsoft as he already spoke about Groove 2007 during past conferences like TechED. He just published a new article describing the main features of SharePoint Workspace 2010. Both Groove workspaces and SharePoint workspaces goals are explained and there’s some interesting focus on specific points like security/encryption, or differences between 2007 and 2010 versions of the product (What is removed / What is added).
Article is available here : http://blogs.technet.com/sharepointexperts/archive/2010/03/29/sharepoint-workspace-spw-2010-explained.aspx
Thanks Yung for this article!