SharePoint
Use SharePoint 2007 or Wait for SharePoint 2010
Joel Oleson just posted his advice about whether to use SharePoint 2007 now or wait for better features in SharePoint 2010: http://www.sharepointjoel.com/Lists/Posts/Post.aspx?List=0cd1a63d%2D183c%2D4fc2%2D8320%2Dba5369008acb&ID=302