It has been done for HN with dataset collected on HN. See description [1]. The initial inspiration we got from HN and discussion here. And the whole demo has been done for fun and curiosity, so it's not a startup, product, or anything we are going to develop further as a standalone app with this design and branding. Otherwise we'll use our own different branding.

[1] http://tehcookies.com/devsalaries/