Check this out.
“Facebook Connect is the next evolution of Facebook Platform — enabling you to integrate the power of Facebook Platform into your own site.”
http://wiki.developers.facebook.com/index.php/Facebook_Connect
FB-Connect is doing great things for developers everywhere like me. Now I can expand the audience of my blog a lot easier to all my friends listed on my Facebook Profile. Just press the connect button on the right hand side of the page, enter your Facebook details and leave a comment please. Any random thing will do!
Just a word of notice, I have no way of storing your email or password, in case you were wondering…