A handy new feature that we feel a lot of users will like is the ability to control emails sent to you that are triggered by various actions in the system. For example, when a story is added to a project, an email is sent to all members of the project.
What we have added is a user settings section called "Notifications". Here you can elect to compress your emails into a daily digest, or even turn off emails completely.
Into the future we will allow more fine-tuning of what emails you get (ie, for every action in the system that sends an email will be switchable by the user). At the moment, it is all or nothing.