It's a pain to read and contribute to HN using a phone. Adding fairly minimal CSS styles to the site can't be terribly difficult to very simply optimize display on mobile.
You could however, make the modifications and submit them to PG to include on the site instead of waiting for someone else to do it. You'll need to download Arc (http://arclanguage.org/) -- the code which runs HN is a tweaked version of 'news.arc'.
For HN, I think you'd just have to email PG. It wouldn't hurt to also send a pull request on the nex3/arc GitHub repo -- it seems that's where much (all?) of the current Arc activity is taking place. It'd also allow others to benefit from your improvements :)
