Concerning the basic UI you can check you what I did here :
https://gitorious.org/opptimizer-n9ui/opptimizer-n9ui

I added HanzBlix and Creamy Goodness to the project. You can modify it as you like because I don't have time for work full time on that but I'm really interested in it. If someone wants to join just PM me

I think a solution as amandalam would be the best with just an icon with a pop up message on top screen and the possibility to change the OC setting in the settings part (as said in the last page).