The multiple icons/colors/message types was actually something we had on our wish-list, along with other things like cooking up a few pre-defined color schemes, or going more deeply into the applications.
So we've had to do everything we could to limit scope. Specifically, we've stuck to just 3 pages: My Space, a list-builder page, and a form-builder page (both taken from file-storage, but that's not terribly important). And we've limited ourselves to one version of everything. And no deep IA changes, or application pages.
So brainstorming about what we could also do is helpful for future reference, if anyone should find the funding/time to continue the work at any point in the future.
Right now, the most valuable input would be ways to simplify what we have ...