Another idea I'm mulling over is using a person's real name for signing in together with their password to provide enough entropy, then enforcing that the passw

Another idea I'm mulling over is using a person's real name for signing in together with their password to provide enough entropy, then enforcing that the password be long enough etc. so that the name/password combination gives you something unique enough to authenticate with. The reasoning behind this being that typing your real name in is somehow more personal, more gratifying and more memorable than typing a username/email. Another slant on this is that people have more than one email address which the authentication mechanism could take into account. The final idea is allowing any of: real name/email(s)/id as a username. Although name is great for interface use, id/email are better for programmatic use.