Cool idea. I always use HN as a starting point for tech purchase. For example, I'm looking for a NAS and the first thing I'm going to do is search HN to see what other people are using. I would totally use this if you expanded to other areas.
Thanks for your feedback and kind words! There's Stuff [1] page there for all the different things HNers link to. But as I'm only indexing links there's not that much data to draw reliable conclusions from. :(