Firewall configure tool

[John Porter Simons <jp royalbarrel com>]

I'm interested in writing a configuration tool for iptables rules. It 
want something that makes it super easy to edit port-only rules (i.e. 
allow :80 incoming), but also provides all the power of editing config 
files directly.

I'm new to Linux GUI development, but I have written win32 applications 
so I think it would be easy enough to pick up. Just a couple of 
questions though:

a) Is anyone working on such a project already?
b) Does it matter if I use GTK or QT? I was thinking of using Glade.

- John