I too heard Howard speaking about GTD back in July. It was the first time I heard of GTD.
In true Howard fashion he was obsessed with talking about it for a week or so and he raved about it so I had to Google and learn more. I'm so glad he did!
I have finally found a system that works for me. People have lots of opinions on Howard but I find him entertaining and I have to thank him for exposing me to GTD.