Thanks to you and shiro for the replies. It sounds as though the REPL is more useful for inspection than modification - which makes sense. Graceful addition of

Thanks to you and shiro for the replies. It sounds as though the REPL is more useful for inspection than modification - which makes sense. Graceful addition of new functionality is useful, but provided by other frameworks. /goes off to think about how best to provide an inspection-based REPL to his web app