Icon packs are a nice idea, but my concern is that the code support and provision of iconpacks would slow down EE, and would also bloat it up a bit, both in terms of memory usage and space.
It probably does belong more to the feature request, in that respect, at least the "icon packs" suggestion does. But for the moment, let's keep it here. Are icon packs a feature that people will want? I personally don't think so. I don't believe that user interface themeability is going to sell EE to users (conceptually, at least
), at least not in the way that it helped with the Mozilla applications.
I personally believe giving a user a fast, functional, somewhat configurable UI is better than one with less speed, and way more configuration options. You can have too much of a good thing, but that's just me.
As for the icons themselves, what does everyone else think? I like some of the icons there, and there is nothing in the LGPL to stop us using LGPL or CC licensed images. It might be a bit different if we wanted to use GPL images though, so please be aware of that before we start adding them in.