BuddyPress.org

Sure you could make some activity items with bigger font sizes of respective paragraphs (p) and links (a)
body.activity .groups
body.activity .new_forum_topic
body.activity .activity_update
body.activity .created_group
body.activity .activity
body.activity .has-comments
body.activity .profile
body.activity .new_member
body.activity .mini
body.activity .joined_group
to name a few – Install Firebug, Firefox add-on, to check the classes/ID’s of stream you want to