Sharepoint skimmer is a GUI theme creator - very cool - and free.. http://www.elumenotion.com/Blog/Lists/Posts/Post.aspx?ID=4
Socket Send Buffer Length- If you want to know why uploading documents in sharepoint seems to take a long time, change this setting in your registry http://support.microsoft.com/kb/823764
Sync between excel 2007 and SharePoint just like you used to do in excel 2003 http://msdn.microsoft.com/en-us/library/bb462636(office.11).aspx
Very clear description of all things security and to find out where cross site groups went to http://blogs.msdn.com/joelo/archive/2007/06/29/sharepoint-groups-permissions-site-security-and-depreciated-site-groups.aspx
