No, you've missed the point.
design.maemo.org would not be about fremantle/harmattan/you name it UI improvements - there's a Brainstorm for that, you're absolutely correct.

It's the center for all things related to visual appearance of maemo apps. If coder needs some UI work in his project - he simply goes there, look for proper designer (UI/icon/whatever) and asks him for help.

Well, something like this.