I'm a subscriber to this and I find it very useful as I go through frequent periods of staying off the net for a week or so and so not visiting HN directly.
Just thought I'd post a message to say "keep up the good work" to kale and "try it out if you haven't already" to everyone else. He does a great job of selecting interesting articles.
Reading the email I was quite surprised to see that it only has 368 subscribers.