Digg it! Pushing a button ...

The extension for Firefox Smart Digg Button adds a button to the status bar. The newly released Digg API is used to determine if the page you are viewing has already been sent to Digg.
If the page is already in Digg, the button shows its current Digg-rating. When you click on the button you get to the post with this page in Digg.
If the page has not yet been sent to Digg, then by pressing a button you direct it there.
Installation is here .