Just do the following:
On that page, click Sign Up
Copy and page the following code into the address bar:
You should see an alert box notify you that the domain have been added.
Finish the sign-up process and enjoy!
About Oli: I’m a Django and Python programmer, occasional designer, Ubuntu member, Ask Ubuntu moderator and technical blogger. I occasionally like to rant about subjects I should probably learn more about but I usually mean well.