I'm working on a similar extension that stores your settings on a server (see my other comment to this post) and was wondering: what are the main Spped Dial 2 features that you use?
The homepage. With the links. Mostly that, in plain, no groups or nothing. Sometimes I like to fiddle with the background and some settings but 99% of my usage consists of that. I watched the statistics page once when I found it. I even disabled the sidebar because it was annoying. I really liked Opera and it remembers it a lot. If you can come up with something similar give me a shot I will gladly try it.