RSS-to-email once a week, maybe with some other kind of filter (quality, popularity, keywords) in the middle for sites with too much noise (HN qualifies, lots o

RSS-to-email once a week, maybe with some other kind of filter (quality, popularity, keywords) in the middle for sites with too much noise (HN qualifies, lots of stories in a week). I think there are a couple sites that do that for HN, but aggregating everything would probably be a DIY job.