Hi -- First off, wonderful theme!
A feature I'd like to suggest is the ability to save all of your template settings (visual effects, blog features, etc.) in a list so that when trying to decide between a couple of different looks, you can easily switch to a previous group of settings to compare. Currently you have to write down all the various settings and then re-do them one by one.
Because this theme is so customizable, this would be a big help.