I was trying out this OpenID thingie yesterday and finally now using my homepage ( http://ankitaggarwal.me ) as my OpenID. Looks pretty cool 
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OpenID is kind of a common and unique ID ( similar to e-mail id ), which can be used to login to various OpenID Enabled sites without going through their Sign-up process. Also, we don’t have to login again and again to different sites if they are in Approved list. Only login to main service povider is required ( mine is myOpenID.com ) and its done. Isn’t it great. Big names like Facebook, Google, Yahoo have also adopted it which I guess is the main reason for its popularity in recent months.
Get an ID for yourself from the link above. I really trust Verisign Labs because the security related services they provide , but chose myOpenID because its the oldest one in the business.
How to set homepage/blog as ID to login :
Once your Signup is complete, you’ll get a URL which will be your unique identifier. To set your homepage/blog as ID, insert the following code in the head section of your html code.
<link rel="openid.server" href="http://server-url" /> <link rel="openid.delegate" href="http://your-openID-url/" />
server-url is the location from where the ID will be resolved ( you can find yours Here by inserting your-open-ID-url including http:// ). After setup is done you can check the same with your homepage/blog-ID.
And Bingo. Its done. Have Fun.
Screen Shots :
Facebook users : For those who don’t know, Facebook is now OpenID enabled. What that means is once you setup your account, say with google account, then you don’t have to re-login on facebook if already logged in with google or gmail or orkut whatever. Just imagine how much headache it’ll solve if used across multiple sites.