Email us to change your webname. Be sure to give us a few options, as it must be unique (e.g., mike will not work, but mike5452 might).

To find out if the name you want is available, add it onto the end of this: http://www.pandora.com/profile/activity/ (e.g., http://www.pandora.com/profile/activity/mike)

If an existing profile shows up, then that URL name is already taken.