For Act! users with Contacts spread across multiple time-zones I would be really neat to have the ability to display the local time on a contact record.
To be clear, this would need to be on the Contact and Company detail page, not tucked away in a tab. You would be able to do a look-up of Contact or Companies that were currently in their normal office hours.
Exponenciel currently have an add-on that does some of this, but only in Locally installed Act! I would like to see this facility in the Cloud interface as well.