Viaweb's architecture

Would the architecture for Viaweb be relevant today? Would PG be so kind as to write up something that describes the architecture in a little more detail? (I recall reading about how they used Apache to talk to some CLisp process, but is there a more detailed account of how things worked?) If the architecture would not work today, could anyone suggest a Lisp-based webserver/appserver that is easy to use and is stable?