Breakdown of "comments posted" and "comments received" in userinfo
Short, concise description of the idea
Let people see how many comments they put on various people's journals and how many they've gotten from each of them instead of just a total number
Full description of the idea
An ordered list of benefits
Just a nice thing to look at.
An ordered list of problems/issues involved
Maybe people don't want everyone to see this, so make it private or have an option for it to be private.
Maybe it's a lot to cram into the userinfo page for very active users so it could go on a separate page.
An organized list, or a few short paragraphs detailing suggestions for implementation
Maybe it's hard to implement or too heavy on LJ resources -- I don't know much about this one. If it's not practical to do it retroactively maybe LJ could just start keeping track of who's commenting on who from now on and let us see that at least.