I've been using Lisp for a little while now, Doug Tolton's Road to Lisp, I am still fascinated by it. I've even fit in a Lisp project or two at work. :)
I attended the ILC 2003, that was an incredible conference. I had a chance to meet with some very great people, and some incredibly smart people. I highly encourage anyone thinking about attending a Lisp Conference. Truly, you have the opportunity to rub shoulders with giants.