I currently work on a project that has some similar technical goals to RescueTime. The OS-level work is what sucks. I don't mind working on GUIs, especially when it means applying the polish that really makes an app shine for users. That sort of stuff I can get into...

As a matter of fact, I fixed the Status Item icons for RescueTime (to match the standard icon style) just the other day because the ones that came with it bugged me!

Here you go!

http://djork.net/rescue/RescueTimeMenu_off.png

http://djork.net/rescue/RescueTimeMenu_on.png