Anyone with experience in the IT security field should be familiar with the name Bruce Schneier. Author of Applied Cryptography, he's one of the definitive experts on cryptography, and he's recently been expanding his expertise into the wider world of security in general.
He recently granted an interview to CSO Magazine, in which he discusses various issues facing security professionals, concerns in a post-09/11 world, and several other topics. He also discusses/plugs his new book, Beyond Fear, which seems like it should be a very interesting read.
Here's the full interview.