Just a thought -- but if we wanted Slashdot or Digg, wouldn't we just go there?
The amount of opinion-based negative moderation that goes on with both those sites means that some interesting posts get modded down because they don't meet the "group ideology" of the site.
How many times have you been frustrated by Slashdot Linux and Mac zealots moderating you down just because you happen to not bash, or heaven forbid be pro Microsoft?
Digg is even worse. Just go look at any of the political opinion boards to see the left-right wingers go nuts.
Is the volume of posts on C9 even high enough to even warrant a moderation system?