Also, I think the "Volume" isn't a great second metric as a KPI. I don't really care--I want to know if the articles are well-researched and well written. Perhaps your combo of reading level and journalistic tone could be the other major axis that show up on the pages.
As a quick interface note, on Chrome in Win7, the stories in the "Spin" portion in the full story screen scroll on top of the header bar instead of under it.
Anyway, this is a fantastic site and I'm going to bookmark it, as I think it will be a fascinating way to read the news each morning.
I think people may be interested in Volume (a measure of how big the story is), but it's not showing enough differentiation by our current methods. I'll make note of that.
Actually pretty cool. I wish I had this for tech stuff too. Any clue when they are adding that?