Quoting from the OpenID Foundation's Web Site

"OpenID eliminates the need for multiple usernames across different websites, simplifying your online experience.

You get to choose the OpenID Provider that best meets your needs and most importantly that you trust. At the same time, your OpenID can stay with you, no matter which Provider you move to. And best of all, the OpenID technology is not proprietary and is completely free."

Now I think that 20% of the people who use the Internet can possibly/vaguely understand the first paragraph, but however by the second paragraph I think it will have slipped down to less than 1%

Confused? I still would be, try the next page...