Prova 3.0 has now been released. The concepts that have gone into it are the result of extensive discussions with a lot of people. I want to particularly acknowledge help from Adrian Paschke, Bart Viaene, and David Jeffery.
This release has an extensive and up-to-date documentation available at http://www.prova.ws/etc/Prova 3.0 User Guide.pdf. If you prefer to read Confluence WIKI, it is as usual at http://www.prova.ws/confluence.