I asked Intense Debate whether blog owners have the ability to edit comments using their commenting system and received the following response:
While I completely understand your interest in being able to delete profanity, shorten a URL extending into the margin, or fix a link, this would be an extremely controversial feature to add in. This feature would jeopardize a commenter’s trust that their comments would not be tampered with or distorted, and would potentially destroy the credibility of Intense Debate.
With that in mind, we cannot give blog owners this ability.
The search for improved commenting continues.