Visio Shapes for Office 365 / SharePoint 2013
This little things are pretty useful for diagramming out Office 365 & SharePoint 2013 environments: http://www.microsoft.com/en-us/download/details.aspx?id=35772
One little trick to using them: After you add the shape to your diagram it will be blue, just turn off the theme for that item (or select many and turn of the theme for them all).