These are all the meetings that have been scheduled for this group. You can scroll through the meetings by selecting the 'Previous' and 'Next' buttons. To sign up for a task select the 'sign me up' link. If you find that you are unable to help with one of the tasks you have signed up for, you can remove your commitment by selecting the checkbox to the right of your name and then selecting the 'Remove my commitment' button.
This page allows you to see who has signed up for tasks at the various meetings.