We just added a new app to the list: Notifications
This app lets you choose from a number of events you want to be notified of by email. At the moment the only supported event is that a member makes a booking in the calendar, but we’ll add more over time. Please let us know what you need.
To add the app to your space go to Setup -> Apps, find the app and click the ‘Visit app’ button. This adds it under Setup -> Notifications.