Last month Mark Zuckerberg said of subject lines and other email conventions, "it really adds a lot of friction and cognitive load to the process of sending email and communicating". It's already acceptable to think like this, apparently. Not, "I try to make sure we always have stamps" or "the blotter stops you smudging the ink with your hand". Chris Messina and MG Siegler suggest email needs better signal to noise - and Gmail needs to change to tweet format. Although somehow Siegler manages to do this in 1400 words, even despite namechecking sentenc.es.