The world needs yet another set of system configuration tools. Yes, it really does. To prove it to you, I give you: Umbrella!. I can hear Baby Jesus crying already.
Sarcasm aside, this is a serious. Yes gnome-system-tools suck, but lets come at this a different way then every other distro on the planet. Rather than write our own, why don't we sit down with the Fedora people and Carlos (who maintains g-s-t) and merge our various efforts into one. Fedora have already produced their system-config stuff, written in the lovely Python. Lets get those into GNOME and start working on this in a collaborative space, not our own little silos. Please?