Some dubstep songs (hat tip p.d.) incorporating "wobble" filter bass:
A "how to make wobble filter bass using Native Instruments' Massive synth" tutorial:
Slightly off topic, it's interesting that with all the internet radio station models out there (Last.fm, et al), YouTube seems to be becoming the jukebox of choice. Even if it's just a single frozen image of a record cover, people seem to want something to stare at while they're listening. Or maybe it's that YouTube's ease of loading appeals over all the complicated iTunes/Winamp style players on the "be your own dj" sites.