You already have an alert on your homescreen. When you've subscribe to a thread and it has new posts, it will be bolded on your Profile page:

http://forums.psychcentral.com/usercp.php

You do have to subscribe to the thread, however. You can make subscribing to threads automatic and your default if you prefer. You do that here:

http://forums.psychcentral.com/profi...do=editoptions

in "Messaging & Notifications," under the option, "Default Thread Subscription Mode."