I just published an interview with Peter Seibel at IT Conversations. I did this interview as part of my Technometria podcast. I saw Peter's book, Practical Common Lisp, in the bookstore a while back and picked it up. Now, I'm a Lisp fan, so he didn't have to sell me on the language. Even so, as someone who sees a lot of programming language books, I was impressed with this one and read it cover to cover.
Peter and I talk about his background, how he came to Lisp, some of Lisp's most powerful features (like macros, CLOS, and multi-paradigm programming), linguistic abstraction as a development strategy, and using Lisp in a production environment. I really enjoyed getting to know Peter and getting his perspective on things. Needless to say, I recommend the book and the interview as something you'll enjoy.