I think cornering is almost a religious topic. Everyone has their beliefs. Don't get me wrong. I'm not good enough to pass judgement, and am a lot less interested in theory than execution.
Anyhow, here's an interesting article on cornering. One interesting point, he mentions pulling up on the inside h-bar and pushing down on the outside h-bar to force the front tire hard against the ground. And if you start to loose it in a corner, set the bike up in a straight line by kicking "your hips to your outside in one quick move. This stops the cornering by straightening the bike up and brings you back on top of your bike with your wheels down."
http://www.coachcarl.com/training_ar.../cornering.htm