[moe]

StackOverflow is a good example (IMHO) of OpenID login done right.

The problem is that StackOverflow is also about the only example of OpenID done right, or done at all...

Yes, there are a few others. But at least in my internet usage I hardly ever run into one. I can't remember having used my OpenID for any site other than SO in the past couple years.

[theBobMcCormick]

Other examples of user-friendly OpenID login pages:

* Tripit.com only supports Google, Google Apps, and Facebook, but it's very end-user friendly to use any of those three.

* Catch.com, like Tripit, supports Google and Facebook OpenID logins.

* mindmeister.com supports Google, Google Apps, or a generic OpenID login.

* springnote.com supports a number of openID providers including generic OpenID. This one is actually an even better example than StackOverflow of an end-user friendly OpenID login/signup page.

Those are just ones I pulled from my Google account settings page. I'm sure there are other good examples out there.

[wnoise]

It shows that it's possible. The question is then why others don't implement it well. Obviously it's not worth it to them, but I think that say more about those doing the poor implementations than it does about OpenID.