Afternoon guys, I know this recurs biannually, but some users forget (or are unaware):
The email address in your profile's 'email' field is not publicly viewable. If you welcome contact, add an email address to your profile's 'About' field.
I've had a lot of valuable contact through HN, and not having the ability to contact users who want/need feedback is detrimental to both correspondents.
For example, I was scrolling through a user's submissions today, and found an old request to review his writing style. Unfortunately, the submission made little traction at the time. Nonetheless, I wanted to dole out some quick grammar and style advice, but couldn't. In particular, adding a new comment to the old thread would have gone ignored, and there was little in the way of information on his profile.
Also, people are always free to contact me.
You should have specified it right in the title that the email needs to be put into the 'about' field (or that it is not visible by default).