Stackoverflow is an example of allowing (almost) full access to an
application's feature set without requiring login. From their FAQ:

"Do I have to log in or create an account?
Nope. You can answer and ask questions to your heart's content as an
anonymous user, much like Wikipedia. However, there are some things
you won't be able to do on the site without registering. But it's
super easy to register if you want to. All you need is an OpenID
account."

A cookie is used to track site usage and associate your actions and
history with your browser. If you ever join, all of that history is
merged into your new account.


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Posted from the new ixda.org
http://www.ixda.org/discuss?post=42540


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