Ok, the map is now finished and can be downloaded from the link in the first post. I'm quite pleased with myself, this is the first time I've actually completed a map instead of just tinkering around like I normally do.
I haven't got a working copy of q3map2 to compile a quake3 version, but if someone could do it for me the .map file is here
and the blender file that I made it with is here
(it has the export script open in a text window.
Have fun. :D