I am an amatuer programmer who is interested in Nexuiz and would like to know how to develop a weapon and provide it to the Nexuiz community. I have never programmed Nexuiz before, so I'm wondering what language(s), compilers, and documentation I'll be needing to get started as well. Any attempt to enlighten me would be appreciated much.

-AnArKiSt

Language is quake C, it's similar to perl or C.
The way to make a gun is to make the model and then edit a weapons file in qcsrc/server
you code your weapon in.

Take a look here:
http://forums.alientrap.local/viewtopic.php?t=3807 (Thread: We NEED more developers!)
http://forums.alientrap.local/viewtopic.php?t=3887 (|thread: "Nexuiz SVN Builds for Noobs" - MINGW simplified)
http://forums.alientrap.local/viewforum.php?f=2 (Forum Nexuiz - Editing)
http://forums.alientrap.local/viewtopic.php?t=3967 (Thread: All visual artists gather here)
http://forums.alientrap.local/viewtopic.php?t=2573 (Thread: HOWTO: Make A New Nexuiz Playermodel.)

That should be enough for a start, as i'm not a modeler i hope someone else also responds..