One of the features we released last month was Alerts functionality. Alerts allow you to subscribe via RSS to either an account level or Atom level feed of your integration workflows. You can subscribe to a "Alerts Only" feed to receive notifications of execution errors or if the Atom goes offline, or a Monitor feed which includes all of this information plus completion notifications as well. The Monitor feed is useful if you need to provide users with access to what is happening in your account/Atom, without giving them a login.
If you are watching multiple RSS feeds, aggregators like Google Reader are great because they allow you to tag and organize large numbers of feeds very efficiently.