[prawn]

If it was against the rules, HN wouldn't include a link labelled "web" under the main article link for people to do exactly this. ;)

[miander]

Ahaha, I can't believe I didn't notice that! Thanks for pointing that out.

[prawn]

I think it's a reasonably recent addition (last few months). You can also click the domain suffix after an article title to see all pages submitted from that source (e.g., all articles from The Atlantic, etc).