A WebSockets server (Faye) for Corona in Node.js. Also has a simple implementation for clients.
See this video for a quick demo.
Once the server (running on port 8000) and clients are running, you can curl the following to the server to send messages to the clients.
curl -v -X POST -d message='{"dataType": "login", "timestamp": "1400015648", "time": "1400015648", "longitude": "78.042155", "latitude": "27.175015", "content": "Submitted for challenge", "profilePic": "http://community.topcoder.com/i/m/CoralBlue.jpeg", "country": "Japan", "challenge": "12345", "eventType": "design"}' http://localhost:8000
There is also a sample client node server that you can use for reference.