Vis-Tastic Batman! (gib visualization plox)

Visualisations would be nice. I do like most people usually sit at my PC whilst i listen to music, doing work or whatever. Bu it is nice to just have my tunes blasting out whilst i clean the house for example. In such cases it would be nice to pop open a visualization whilst the music plays and I'm afk. Serves a dual purpose as a screen saver too, for what its worth.
Also needs to have fast access to turn it on and off, like a button in the corner or somethin'.