If you liked the look of Audiopad a few weeks back, and you've got a Mac, then you might enjoy Sonasphere. Created by Japanese musician Nao Tokiu, it's a 'music environment' - you create blobs in 3d space - each blob can be a sample player, an AU effect, or a mixer. Then you can set the blobs to move about, and things get very complicated. As you've probably guessed, I haven't played it myself (I don't have a Mac at home), but the videos are really amazing looking - the blobs aren't static, they're moving about in this amazing iTunes visualisation-type 3D pulsating globe. Anyway, have a look, and let me know if it's any good.