Ello is a bright and clean new social network that promises, in its manifesto, to stay free of ads, never sell your data, and not make anyone use real names. People are paying attention to Ello because other people are paying attention to Ello. It is invitation only. New members were joining at the rate of 4,000 sign-ups per hour yesterday; the site is doubling in size every 3 or 4 days. Ello just notified me that I can't send out invites right now because "Ello has gone viral."