Speaking of Milkdrop, the sources of milkdrop 1 and 2 have been released [1]. A couple developers have taken the milkdrop 1 sources and built them into a cross platform visualization software called projectM [2]. Milkdrop forever!

[1] http://forums.winamp.com/showthread.php?t=214971 [2] http://projectm.sourceforge.net/