Perfect. And adding a border makes it look real nice. Thanks Lynne!
HTML Code:
/* Lynne's activity stream solution */
li.activitybit.calendar_event {border-style: solid; border-width: 1px; background-color: #FFCCFF;}
li.activitybit.forum_thread {border-style: solid; border-width: 1px; background-color: #FFFF99;}
li.activitybit.forum_post {border-style: solid; border-width: 1px; background-color: #FFFFCC;}