I love everything that Q-Games makes, even if they aren't really games sometimes. These are musical people, and as one myself I always connect to what they do.
While musical visualizers might not normally be exciting enough to write home about, Q-Games' new Visualizer is a new PS3 application that draws on what they learned from their awesome not-a-game PixelJunk 4am. This new app, set to launch tomorrow in North America on PSN (Europe and Asia to follow soon), gives you an interactive background for your music. Q-Games suggests that it would make a good backdrop for parties, or a nice screensaver for your television.
If this sounds like your kind of thing, the launch price will be set at $2.99 for two weeks only, with the price bumping up to $4.99 after that.