Yeah, we have Amazon affiliate links set up so we get a little share of the purchases. There's ad/sponsorship possibilities and a couple other ones we're exploring.
This is really cool. It is the first Show HN I've immediately added to my favorites and sent over to non-technical friends. Also I'm glad you found a good way to monetize without adspamming the crap out of the sidebars. To echo above, really cool execution.
Thanks for checking it out!