Related question: does anyone have any info on using a super simple voting system (thumbs up/down, or just up) that does NOT suffer from time bias. In other words, an item might have more up votes just because it's been around longer.
Bias your comment ordering system in favor of new comments so that every comment gets its 5 minutes of fame before staying around with a good score or floating to the bottom with a bad score. it's not perfect, but it should mitigate the problem.
