On the length issue: Honestly, Steve's posts were quite long (much like Paul Graham's). To me, it doesn't matter, because every one of them was worth reading all the way through. It sometimes meant I'd have to leave them for later, but I still read them. He mentions that he believed the length might have been a reason people read his posts. I can't speak for anyone else, but if the quality of his writing stays the same, I don't care how long his posts are, I'm reading them. The day he "retired" was truly a sad day for me.
By the way, I would happily buy a book of his collected writings (ala Hackers and Painters), so I really wish he would make such a book.