I guess this needs more details. Currently, the Players tab and Database tab have an export option for "Email addresses", which allows you to provide a format, like "First Last" <Email>", and saves a file with the addresses. In the next beta, this will instead open a dialog with that data, allowing you to simply copy/paste from it, with a "Save" button to save it to a file.
This is pretty easy to add. But you also mentioned phone numbers. How should phone numbers be mixed into this?