The examples included in this SDK demonstrate communication between the development kits and the cloud service using MQTT protocol.
Examples here use Xively as MQTT broker and cloud provider.
Xively is a company that provides remote services for Internet of Things. Xively Personal is a web application for connecting and managing IoT devices.
Xively is built on LogMeIn's cloud platform Gravity.
You may ask Xively to create an account on Xively Personal that you can use to connect devices and build small IoT projects.