Slasdot Article Summaries?
The comments following the articles on Slashdot often contain some gems of additional information -- hidden under tonnes of junk. It'd be useful if people would wade through the junk and find the useful stuff so you didn't have to.
There is, of course, nothing stopping people now from adding comments to the discussion that contain this 'best of' information, but I think the way things are set up at the moment is not as conducive as it could be to doing so. Perhaps the simplest way of doing it would be to have separate types of comments for these 'best of' type summaries, simply so you could jump straight to them.
Creating these summaries would be a bit of work, so there is an incentive issue here. Slashdot employees would have a pay incentive. But I think you'd also want to slashdot readers doing it, and for them the notoriety incentive could work -- by gaining a reputation for creating good summaries. It's fairly obvious there's a parallel here with blogging.