I've been mixing on ableton for about a year now and just starting to get into doing dubstep on it too. I've gotten a lot of help from http://www.blogdubspot.com
But after getting comfortable with using the Simpler Instrument for making my dubstep bass i want to figure out how to make it more wompy than it already is. here's the tutorial for using the Simpler Instrument to make dubstep bass.
if you use Ableton you've definitely got to try this. And basically what I'm looking for is more sounds to use in the Simpler Instrument to make a good dubstep bass with.
and here's some other tutorials
and one more...
if you have any good dubstep or just ableton tutorials post em up.