Access to our request logging has been made available. This lets you see the last 20 requests you've made to the API, how the API understood them and what the response was. This should aid in debugging badly formed requests. For more information refer to the Debugging section in the API documentation.
* OAuth test users
For apps using OAuth you can now create up to 3 test users on the Sandbox server and you can log into the Sandbox web interface. For more information refer to the Test users section in the API documentation.