I made a patch that implements rotating doors (doors which open like "normal" doors, as opposed to sliding doors).
If you are interested in it, please try it and give me feedback.
You can download the patch and 2 really stupid demo maps from:
http://rear.endoftheinternet.org/~blub/ ... 0b3e814dfd
Unzip it, apply the diff to your svn checkout and copy the pk3 into your ...nexuiz/data directory.
You can also view the code at: http://pastebin.com/m778469b3
Then run:
nexuiz +map rodoor # a very simple map with a pair of linked rotating doors
nexuiz +map viteamea_ro # a variant of vitamea_v2 which contains rotating doors around the red base
Note:
A feature that is not implemented yet are "bidirectional" doors, which open away from the triggering person (suggested by Ronan). That's on my todo list.