I played with it @ http://webshell.io/prototype/Njc5Z/7

It seems to work. This uses a REST service I recently wrote in node.js + mongodb.

Edit:

14 people click the link and hit Run, but no one changes the text? Come on. I wrote a second little app to track this at http://webshell.io/prototype/Njc5Z/8 just keep clicking Run to see it update, as people run the original app and hopefully enter their name or something.