i just showed nexuiz to a few friends of mine at a lan. they all loved it. only small problem was that we had to connect manualy with the console to the gameserver in the lan. not only that, but the key to open the console does not work in the menu, so we first had to click on instant action to create a game, then open the console and connect to the server.
other than that it was great. (expect perhaps the flags that fall outside of the world in capture the flag, but ive seen that this is fixed in the next version)