DokDok, a Montreal-based startup, has had an email attachment management application on Google Apps some time. To make this work, it made an API to use internally that intelligently uses email accounts as if they were datastores. Recently, the company announced that this API would be renamed Context.IO and available to all.
Google has announced that it is updating the Google Calendar API rate limiting and monitoring schedule in an effort to better manage usage fallout after passing imposed limits. Previously the rates were monitored daily, allowing for prolonged downtime if usage was poorly managed.