Of the connotations that can be relayed, I found 'highlight' as the least personable. To escape from guessing intentions in diction, I'm more a fan of 'circledot' or 'wheel' or 'some hubski-esque word without meaning'. Keeps it central to the site and no room for interpretation.... you just circledot them, take know?
EDIT: This sound weird, but the more I think about it, why not 'orange'? That's what we all see as our own posts/comments.