Rumour has it that Magnetosphere, a really rather nice visualizer plugin for iTunes, will be incorporated into iTunes 8 (which could be out as early as this week). Magnetosphere is no longer available from Barbarian’s site (though you can still grab it via this blog post).
I’m not normally fussed about visualizers, but the original Magnetosphere produced some lovely organic effects, with swirling, pulsating stars and light streams. There are a few Magnetosphere videos out there that look even cooler (here’s one, here’s another, and here’s a third) – these all look like they were pre-rendered rather than real-time, but still, they might give a taste of things to come. Roll on iTunes 8 I say!