I founded the ioquake3 project with some friends in 2005.
The experience of working with the OpenArena project was similar to that described by HEMI_426. At this point they have cut off communication with us and I would be surprised, but happy, if that relationship ever improves.
So, now we are attempting to create our own freely distributable, creative commons licensed, game to distribute whenever anyone downloads ioquake3 that won't be "adults only" and won't have anything to do with OpenArena's direction. Until it is ready there are plenty of great games made with the ioquake3 engine and you can check them out here: