This is the Preferences part of the Synergy iTunes Controller for Snow Leopard.
Synergy gives you total control over your music without interrupting your workflow. It puts attractive, unobtrusive buttons in your menu bar that allow you to navigate your music collection and control iTunes without ever having to leave your current application.
But it's not just about control; it's also about feedback. The Synergy Floater is an adjustable, semi-transparent window that keeps you informed of what's playing whenever you need to know.