If I install a service such as Docs, Calendar, or Wave in my Google Apps account I get the ability to change the URL of the service from the stock-standard https://www.google.com/[service]/hosted/[my domain] to something more meaningful.
As a result, my calendar service is at http://calendar.[mydomain], documents is at http://docs.[mydomain], etc.
However if I install a service from the Google Apps marketplace, I don't get the option to change the URL.
Is there any way I can do this?