Is Digg available for public use? Can anyone subscribe?

Yes, registration to Digg is free.  Simply go to http://www.digg.com/register, and submit your account information.    Digg registration enables you to

• Become part of the Digg editorial process by digging and burying stories.
• Submit new stories you find on the web.
• Follow what your friends are digging, submitting, and commenting.
• Keep a history of everything you digg.
• Customize the topics you want to follow.