It would be great to see Roundcube integrated with ISPManager. I actually asked the ISP team if they could have an easy-install for Roundcube from within the server control panel, as many of their users have been asking for the same feature.
The ISP team responded by saying that they would be willing to provide this if the Roundcube team could work with them to achieve the integration (like cPanel has).
ISPmanager - Web Hosting Control Panel, ISPsystem Control Panel
