Ok - we are diving in: Today my partner and I decided to drop Lispworks (and especially Windows) and go with SBCL and Ubuntu for our first server box which we'll host at our office. We are on schedule to go live in about 2 months. He had been looking into SBCL for a while, and is convinced its the way to go. If we find problems with it, we (or more likely he as he is technically amazing compared to my self-taught lisp hacking) will contribute to the source code.