Ooo, this inspires a good idea: a multi-dimensional voting based forum. You can up and downvote based on things like veracity, tact, agree/disagree with position, etc.
Checking slashdot, they appear to have filters in their comments for things like 'insightful' and 'imformative'. Thinking more along the lines of being able to rate things like the veracity and tact of the response, with automatic filtering and prevalence based on a few metrics.
I've been considering how to do something like this for awhile. Almost ready to start up work on the prototype :)