If you look to the right side of any page you can find a smll "Switch to:" box and underneath it a link with the name of your Utopia team which will take you to that team. This is located right above the "Buddy List" box.
Also if you click on your regular team name in the left menu you will be moved to the "Team Headquarters" page. There, underneath the box for your regular team there will be another box with your Utopia team name and at the bottom of that box a link to switch to your Utopia team.