So what do we mean by using your OpenID to log into a site? For example, if you were to log in to Ma.gnolia, you would see the login screen at right (top image). You would enter your claimID URL into the box (as you can see, I've entered mine), and then simply click the "Sign in with OpenID" button.
Once you click the "Sign in with OpenID" button, you'll be transported back to the claimID openID server, which will then log you in to the site you were trying to visit (middle image). Of course, different sites will have somewhat different login experiences, but the thing to remember is that you'll simply be using your claimID URL as your OpenID login. You'll always want to be sure that you see "http://openid.claimID.com" (see image to the right) in the URL when you are entering your password (bottom image).
We realize that this is somewhat different from how you've logged into sites in the past. It used to be that you would have to create a new account on every site, remember a new password. That account and password was your key to that site; with OpenID, it is your URL that is the key.
With OpenID, you can easily set your webpage or blog up as an identity URL using delegation. For example, say your blog is "myblog.com", and you'd like to use this URL as your OpenID rather than your claimID URL (we promise not to be too offended). By inserting a little bit of code into your blog or website, you can easily make this blog or website your OpenID.
Rather than logging in with http://claimID.com/username, you'd log in with http://myblog.com. Of course, claimID will still be providing the backend (no need for you to install your own OpenID server!) so you'll be asked for your password by claimID. However, when you show up as a commenter on a Livejournal thread, for example, your blog or website will be your OpenID url.
To set your blog or website up as a delegate, simply add this snippet of code into the <head> of your page. It will need to go between the <head> and </head> elements on the page. Please note that you'll need to replace USERNAME with your claimID username.
Brilliant! And now you can log into all of the great OpenID sites with your blog or webpage.
We realize that you may have a number of OpenIDs, and you may wish to consolidate them. Simply browse to your account settings, and you can easily add other OpenIDs to your account.