We are running a test setup of Google App for education for the Faculty of Computer science under the http://gogo.unibz.it domain.
You can access Google Apps directly from http://mail.google.com/a/gogo.unibz.it after you have set your password. On this page you will also able to get you google@gogo.unibz.it login.
The service is provided with support based on best effort.
Once you have set you password ad have logged in you can manage your account from this page https://www.google.com/accounts/ManageAccount
Here by following the Edit link under Multiple sign-in you can activate multiple accounts for the same browser session, for example to be able to quickly switch to and from your preexisting private Google account. A logout from Google is required for the activation of this feature.
Please see also http://www.google.com/support/accounts/bin/answer.py?answer=179235&hl=en