The DiggBar from the point of view of Digg:
The DiggBar from the point of view of a website owner:
(For background information, start with this Daring Fireball article, then if you're still vaguely interested the next two days of link archives, and possibly my article about how to many people, URLs are an opaque browser feature, and possibly my rant about how it's Google's job to map the web, it isn't the web's job to design itself around how Google happens to map it today.)