[Building Sakai] what do you do about the /access login interceptor with CAS

[Charles Hedrick]

Currently we are using CAS in production. We've got a problem. If someone sends a URL in email, and the user isn't logged in, they are sent to the CAS login. This is fine for our users, but doesn't work for guests.

How would I bring up an intermediate screen that asks for either CAS or guest login? Or is there a better approach?