Please go to https://go.urbanairship.com/accounts/register/
Enter your email address, first name, last name, username, password and click on "I Agree, Sign Me Up"
The following screen is then displayed
A confirmation email should be received within c.10 minutes of submission. Click on the activation link to complete the account process and take you to your new account.
Click on the My Account link to view or modify the account setup
You will need to add your billing information to enable push notifications. See http://urbanairship.com/pricing/ for further pricing information.