Alpha menu bar

[Koelling]

This is more my roomie's request but I think its cool too. When you force quit, the menu bar goes translucent. I think it would be cool if it was like that when there are no open windows because you have the option to hide drives, you have the large open desktop with your gorgeous desk top pic (Mine's calvin and Hobbs) but the top centimeter is cut off. It would get annoying to have it translucent all the time (seeing some abstract colors under the menu while in your web browser = not good) but when all windows are closed or it might even work whenever you are in finder.

Any way, as I think about it, there must be some sort of action that already allows this because it works with force quit. Does anyone know any apple script commands that utilize this?