I was quiet for long time but eventually I have something to show :).
This is really a sketch, for now it's not integrated with SS. Works only on FireFox (1.5,2.0) but has all major features.
Address: http://mujma.dmkhosting.net/htm/main.htm
Known issues:
Server where I placed it is quite slow so please wait until the image will be reloaded (that happens later than indicator disappearance) otherwise you may encounter some strange behavior (I will fix this as soon as possible).