But following those instructions it still doesn't work.
500 - Internal Server Error
This server has encountered an internal error.
Follow these instructions: change the domain name that appears in the URL in the address bar of your web browser from tinyurl.com to b.tinyurl.com and leave everything else the same. Press the "go" button or hit the return key to be redirected to the page the TinyURL you followed goes to.
We apologize for the inconvenience this may have caused you.
Has it been overwhelmed by twitter?