AphasiaBank relies on a mailing list at firstname.lastname@example.org. Subscribers to this list should be researchers who plan to collect transcript data using the AphasiaBank protocol.
To subscribe to the list, you can click on this link. When you do this for the first time, you will be asked to set up a Google Groups account. They only ask for your name and password. After you do that, you can go directly to the relevant list and subscribe by selecting "edit my membership" which is an option in the middle of the column on the right of the page.