The site has been dead for a few weeks. I've tried messaging the developer there but haven't been able to get a response.
It's mostly not on archive.org or archive.is.
I'm pretty bummed that it's down - it had great interviews with people like Keith Rabois, Sarah Tavel, Elad Gil, David Hornik, Daniel Gross, Justin Kan, etc. Would be a huge bummer to think that all the hours those people spent answering questions on there are lost.
Long shot but - did anyone on HN archive it?