Paul Graham, co-founder of ViaWeb, writes about using lisp on the backend of their webapp: So if Lisp makes you a better programmer, like [esr] says, why wouldn’t you want to use it?
(Found this from David Weinberger’s blog where he writes My own book, The Adventurer’s Guide to Interleaf Lisp, continues to sell high into the single digits every year. I only wish I were kidding.