IT Security posted their list of The 59 Top Influencers in IT Security. They say their list includes "...most influential security experts of 2007 - from corporate tech officers and government security types, to white hat hackers and bloggers." I don't get caught up in whether it's the right list or complete list. Instead, I use the list to look for names that I don't recognize to see who might have new ideas or thoughts I should explore.
On the Microsoft side, I like to browse the following lists to see what our security-minded community is up to: