Just sharing some soundbites around Open Source Deployments. The usual candidates with high revenue and enterprise placements are RedHat Products (Linux and Java) and MySQL.
The adoption of business like application is also interesting. While British Telecom adoption of an open source ERP platform seem premature, I like to point out these numbers below given by the associated web sites.
For References Jaspersoft offers a Business Intelleginece Platforms, Alfresco a full featured Enterprise Content and Document Management System with Collobartion Tools (compliant to Microsoft SharePoint Protocol), SugarCRM a full featured CRM solution with PABX integration and Zimbra a web based E-Mail and Groupware Solution.
