I think that would work well (especially if the grouping could be largely automated). I personally would like to see a category for articles that are purely intellectually stimulating (e.g. stuff equivalent in thoughtfulness to pg's essays).

On the other hand, I think it would be useful to have strict limits on how far the culture stretches. We should try to preserve the geeky, business-y, thoughtful culture, rather than going the route of reddit where everyone's allowed to do what they want.