Here is a map I posted originally for another game, ported to Openarena and released under the GPL with the .map file included. The map has been scaled down to better suit the Openarena gameplay, and might make a decent CTF with a bit of work, but as of now its still only a beta.
http://dodownload.filefront.com/9872511//c812d7bda9ca7ed6471015d436c83c03ccb6aad358c9f01c42883cfd93f60a27978e9df65b8d27dbUnfortunately at this stage you will have to type "/map spacefighter_factory" in the console to get it to work.
Major problems: 1. THIS MAP HAS NO WEAPONS. AT ALL. I simply cannot get them to show up in game. I can get weapons working in any other custom map for OA, just not this one. And its driving me insane. I have a hunch that the map file is corrupted in some way connected to the previous game.
2. This map has no bot support. Even though it only has 13,000 planes, and apparently the limit is 30,000, bspc gives me a max_map_planes error.
If anyone wants to have a go at solving these issues, go for it.