I think it is complicated in that you are put in front of so many buttons and choices, whereas before it was one way: username and password.
This is probably the main user friendliness issues with openID. It's made worse by the fact that your Google/yahoo openid is some long URL and that typing in your yahoo/gmail in an openID 1.0 box doesn't redirect you to the login page like an openid 2.0 box.
This is probably the main user friendliness issues with openID. It's made worse by the fact that your Google/yahoo openid is some long URL and that typing in your yahoo/gmail in an openID 1.0 box doesn't redirect you to the login page like an openid 2.0 box.