You might find my Hacker Newsletter project (http://hackernewsletter.com) useful if you're not on HN all the time. It comes out every Friday. In addition to that, I'm working on another newsletter that will provide even more reading on a daily basis. Details on that will be in next week's issue. :)
Yeah, I was being more general and answering the "find submissions just like on HN" question (you can't get any closer to that than with other links on HN that you missed). A lot of the feedback I get from subscribers is how they enjoy the newsletter b/c even though they're on HN, they miss a lot of the articles I link to.