I bought one of these: http://www.brighthub.com/electronics/gizmos-gadgets/articles/83175.aspx?image=103657 http://www.brighthub.com/electronics/gizmos-gadgets/

I bought one of these: http://www.brighthub.com/electronics/gizmos-gadgets/articles/83175.aspx?image=103657 http://www.brighthub.com/electronics/gizmos-gadgets/articles... and wrote a plugin for CherryTomato: http://www.beatpoints.com/cherrytomato http://www.beatpoints.com/cherrytomato - so now when I am in pomodoro, it goes red, indicating to my colleagues not to bother me. Works pretty well, though the Skype/messenger status seems more effective.