Here are the steps to join a group.
Go to the main site: http://photographertophotographer.com
Log in either with your username and password or Facebook Connect.
You will be redirected to your profile page:
Hover over "Applications", click on "Groups"
Click on "All Groups"
Scroll down and click on the group you want to join
Look to the right and click on "Join Group".
Click on yes when prompted.
You will now be notified of any new activity in the group.
Please email me if you have any problems or questions.