I want any particularly long word to be forcefully split instead of making the page wider than the window. I'd have thought 200B is the "right" way to do this.

What I'd really like is markdown, but I don't suppose there are too many implementations of that sitting around for Arc.

I think this is actually a ploy by PG to ensure quick initial adoption of Arc. When he finally does release a version of Arc, lots of frustrated hackers will learn Arc so that they can contribute patches to news.yc. ;-)

long urls as in 'http://link-to-site' in the discussion or 'story titles' in the main index?