I also wonder if there's any way to build some lightweight features on top of these job postings (sort by location, skills, etc) without it becoming YAJS (yet another job site).
Well, if every such post started with something like "Hire HN:", then searchyc.com or another site could keep them in the sidebar or something ... that might be handy.
2) I repeat the links below to make them clickable. I also noted the time since the "Who's hiring" postings were made.
360 days ago: http://news.ycombinator.com/item?id=375410 [Ask HN: Who's Hiring?]
99 days ago: http://news.ycombinator.com/item?id=759452 [Ask HN: Who's Hiring? (take 2)]
99 days ago: http://news.ycombinator.com/item?id=759756 [Ask HN: Who's Hiring... Students?]