I started playing around with OpenID today. It’s a solid concept – single set of credentials for signing on to multiple sites. This means that for a site that is a Relying party (ie – the place you want to login to), you can enter your OpenID URL and hit “Login” – you’ll be redirected to your OpenID Provider, where you’ll be asked if you trust the original site. Depending on the provider, you’ll be asked to trust Once, Forever or Never