IPhone app I use to read HN has been busted and not showing usernames on comments for over a year now. It's annoying at often tell when some of the more active HN users comment because because their voices come through so strongly. A Patio11 comment (uber-detailed) is immediately recognizable. So is a Tptacek comment (aggressively but gracefully contrarian) or a PG comment (short declarative sentences followed by many many many responses).