The difference with Stack Overflow is that you can, and may people do, use it without an OpenID. Just go ahead and post a question or answer, and you'll be assi

The difference with Stack Overflow is that you can, and may people do, use it without an OpenID. Just go ahead and post a question or answer, and you'll be assigned a cookie-based account. And if you put in an email address, you can download a new cookie for that account at any time.