Paul Buchheit seems to visit regularly: http://news.ycombinator.com/user?id=paul

You may also have noticed Paul Graham: http://news.ycombinator.com/user?id=pg

I'm not aware of accounts of any of the others, though I'd be surprised if most of them hadn't heard of HN, especially the investors.

I'm not sure what I would make of the billionaire Mark Zuckerberg squandering his time by reading my useless comments.

I like how Paul Graham describes himself as a "bug fixer."