User accounts are unable to edit identity names or create new identities.

Haha, whoops! I'll get the "Create Identity" button added back in tonight

This will be fixed in ~5 minutes. Go to your Profile, hit "Switch Identities", then you'll see a green button for creating a new Identity.

No editability of Names yet. Your Name is turned into your identity URL and I have to account for old name redirects, so that'll take a little longer.