Would love to get people's feedback - built this for myself over the weekend as a way to accelerate and limit my reading of HN (and being inspired by the NLP course from Stanford).
The NLP is pretty basic and takes a ratio of the original article, so you do get some longer listings.
Big thanks to Wayne Larsen of hckrnews.com for providing me with some insight on tracking top stories and letting me use his ranking data. Also, I recommend http://www.hackernewsletter.com/ for a human-curated version.