Not yet, but maybe the end of the Internet. Yesterday i try a old function from my Google Reader. With this function the Google Reader detect the next unread post on your feeds and provide the url over a auto bookmark to the orignal post.
You can configure this function with your Firefox browser inside the settings of your Google Reader.
When you read all your feeds over this bookmark and there is nothing left you will reached the End of the Internet. You have not enough time to read all your feeds ? Try this link.