I remember Zitheral had some really cool ideas going for WFA 3.5b extensions. Myself and Niall helped him test some stuff out one night. I think he is going to use some of those ideas in WF:R. The only problem being that it seems like a hell of a long time between now and when WF:R will be released.
Anyhow, the next WF can't get here fast enough for me. And I am glad it won't be implemented on a UT system, the weapons in UT aren't as badass/crazy as the Quake weapons. After seeing the WFA chaingun, every other weapon has been weak.
G