This 2-day hands-on session is targeted at experienced users, integrators and developers who want to learn more about customizing, extending CiviCRM. The agenda will be finalised based on your interests. Topics could include: * How CiviCRM works - code layout and architecture * Customising CiviCRM - templates, hooks, localisation, country specific requirements * Become an effective developer - co-ordinating developments with core team, the API * Share ideas, tips, and experience with other UK and Europe CiviCRM users and developers. * Integrating CiviCRM with Drupal and Joomla, including advanced profiles, CCK, organic groups, Views2 * Usability improvements * CiviCRM and multiple clients, including multi-site CiviCRM * State of the project and input into upcoming releases, including CiviReport! Participants should be prepared to bring their own laptop with a working local installation of CiviCRM.