1. date/time or "minutes ago" of last comment
2. first 40 characters of that comment...
Most of the people I like to follow are already on the leader board. It sure would be nice to know who's on-line right now and what they're talking about without having to drill down 20 times.
Possible additional benefits of this enhancement:
1. People may take an extra moment or two to examine their comment's quality if they knew it would shortly be on a "master" page for all to see.
2. An additional route for people to join a conversation they're interested in.