The game seems tight, gameplay wise. I haven't noticed any bugs either, and the netcode is good. Their next step might be to polish things up by enhancing the graphics further and removing any Quake 3 default behavior. Nothing insane such as adding bump mapping, though! Maybe some more animations and models for the weapons (things like reload animations, adding hands to the human weapons, giving the aliens claws in 1st person etc). I really hope they don't change the gameplay too much. :)