Since one year and no visible bug after 18 small releases, we use Play! 1.2.4 in a production "absences" intranet application for a school (actors: >100 teachers, > 700 students, administrativ team). Client side has been written with FLEX 4.6 from Adobe (very beautiful views). Data are send and receive in AMF3 format (Cinnamon module). We use a own simple dao layer based on JPA EclipseLink and MySql for the DB. Application is stored on a Linux virtual server. I'm a very fan developer of Play for its simplicity and its very productive approach.
