There are quite a few people in the Information Security Industry these days. Who do you like to listen to? and more importantly who provides you with useful information you can act upon? Such people may not be well known - let me know who you'd recommend.
I'd like to expand the number of people that speak @ TechNet events both in person and online. Your feedback and suggestions would be very helpful.
Steve Riley. Hands down he is the best security speaker Microsoft has; probably the best speaker I've ever seen. I would add to these as close seconds: Jesper Johansson and Kai Axford.
I would drop whatever I was doing to go listen to any of these guys talk about Security topics.