I would like a Lisp application server in which I can deploy and undeploy multiple applications on the fly. It would be nice to be able to deploy some applications as parts of others (and falling within their parent's URL-space). An app should also be deployable at the server's root.

Because an app my be deployed multiple times in a single server, its deployment location is not an attribute of the app, but of each deployment of that app.

Every app should have available to it the full URL at which it is based.