+1 for ngrok. It is more recently updated. Some would say it is easier more flexible for the rest of us. This is a recent blog post about it: http://www.elcoderino.com/tag/ngrok/
This is particularly great news for me. I live with firewalls both at work and at home. Now I can reach through into my linux machine over the web using something like tty.js - Thank you very much for improving the development and documentation. I am just a hobbyist web developer and I'm sure there are many others like me who will benefit from the combination of both projects.