Here's how to edit your group settings to stop receiving group digests:
Scroll over the 'Groups' tab.
Click on 'My Groups' in the drop-down menu.
Go to the page of the group you no longer want to receive digests from.
On that page, under the description of the group, click on 'Group Settings/Leave Group'.
Beneath 'Group Digest Email Preferences', choose 'No'.
at 4:51 AM on May. 10, 2010