Very cool idea. I recently spent quite a while paging through HNSearch.com looking for book recommendations. My recommendation would be to make sure the "Next" button never moves. Some really long titles cause it to get pushed down a bit and that gets annoying when you're clicking on "Next" at a fast rate. I also agree there needs to be a little more information on the page because of the sometimes-indirect post titl…
If I recall, there was a guy who also scraped hn but included movies and other things. It wasn't limited to clicks, he had all the information in lists.
Maybe it was me again with http://www.hnstore.co/