While working at the international agency network Scholz & Friends, I implemented Google Apps as a SaaS business solution within the entire network across various locations all over Europe for 1200 users in 2010. Google created a case study with Scholz & Friends and published it on their success stories page dedicated to the German market in 2011. Among other clients such as GE, Genentech, Qype, Radio.de, Salesforce and myTaxi, Scholz & Friends is one of the most prominent customers.
The case study can be found in a PDF named “Erfolgreiche Kreation dank zukunftsfähiger Technologie: Scholz & Friends nutzt Google Apps for Business”