Using Instaservlet is as simple as requiring the Instaservlet module and calling with your servlet function. For example, the following is a complete servlet that uses Instaservlet to handle all web-server configuration:
'(html (head (title "It's working!"))
(body (h1 "Instaservlet is in the house!"))))
That is basically all there is to Instaservlet. By default the web-server listens on port 8765 to connections from the localhost only. You can change this by passing optional arguments to "go!". See the Instaservlet API for details.