I’ve held off implementing Disqus or IntenseDebate commenting systems because they don’t let me edit comments left here. IntenseDebate has changed. According to Michael Koenig:
You can edit comments within the WordPress moderation panel the same way you used to before having IntenseDebate installed. Your changes will be synced back into IntenseDebate. To do this you will need to disable IntenseDebate Enhanced Moderation in the plugin settings page. (Source.)
This is great news!
Update. I have added IntenseDebate comments to blogan. If you see any funkiness, please let me know.