Once I had my account setup I clicked the "Send test message" button and no message was received. I immediately installed the Chrome "send URL to Notifo" plugin and it worked flawlessly.
Also - in regards to the Chrome extension.. there's another issue with that one that I need to fix soon. It currently requires two clicks to send the message properly. doh!
There is an issue where it only sends to mobile devices and not through the API, so it doesn't work with the desktop apps. Disregard that for now. Thanks.