Service Portal was released in Geneva as a technology preview, full version will be released in Helsinki. In this tutorial I create a simple Hello World widget that makes a call to the server to retrieve the "name" based on the supplied "username".

The code used in this tutorial is available here: http://serviceportal.io/geneva-service-portal-creating-a-hello-world-widget/

If you find this tutorial useful and would like more like it, let me know in the comments sections.