Automessage Actions

Hi.

In step 4 of the plugin page, it's written: "the default installation only has a single action for each level". Is there a non-default installation? Does that mean the plugin could be extended with other hooks? That would be great (out-of-the-box or by extension):
- User/blog signup (send reminders if the account has not been activated)
- BuddyPress friendship requests/accepts
- Any other "event" that sends emails

Thanks.