OpenID things to keep in mind
This small presentation runs through potential risks of OpenID, its not saying its bad just where the risks lie: Risks With OpenID...
Web Development Services for Small Business
This small presentation runs through potential risks of OpenID, its not saying its bad just where the risks lie: Risks With OpenID...
Here's a great introduction to OpenID: Implications Of OpenID (Google Tech Talk)
This person describes how by deleting their old blog on wordpress.com they deleted their OpenID too. This meant that they were then locked-out of other sites that they had authenticated using their wordpress.com username. The lesson here is think twice before deleting an account that you have used to authenticate others ...