Hi Anthony, Twilio service status available via our public status page http://status.twilio.com/ We communicated degraded international SMS service to customers on August 16.
You bring up a good point that the information might not be readily discoverable. We'll work to make the status page more findable and to extend the API (http://status.twilio.com/documentation/rest) with features such as RSS to let customer subscribe up-to-the-minute status information.