MacMatrix has updated SideEffects which combines SIMBL and and ColorfulSidebar to return colored icons to OS X 10.8 Mountain Lion. The best part is having your custom drive icons back (as they really do help you hit them).
The only thing that did not work for me was the finder restart added to your Users startup items, and I had to use my own I made with Automator, but I am back to color icons.
Don’t these look so much better, and I love my custom icons as well!
I am still have some SIMBL crashes though, but have been in contact with the creator to see if we can clear them up, as I love my color finder icons!