Tired of the Twitter API rate limit? With Apigee you can now bypass that limit until 20,000 API requests per hour (source). It also offers testing tools and analytics. As someone who has developed web applications using Twitter API, I certainly see the advantages of this platform.

The integration with heroku is also much. And since now any service can be integrated with heroku through their provider program, I expect more and more add-ons to be available for developers' comfort.