Great news! I created a web sockets server running in particle by porting over some Arduino code.
The repo can be found here: https://github.com/elhajj33/ParticleWebSockets
All it does at this point is allow you to open a socket to carloop and send/receive some data. The example HTML file should help. That said, it definitely opens a socket
You're probably asking this is fine as a particle example but is there any obd data? The answer to that question is there isn't any yet. I'm working on integrating the remote obdII data code written by Zachary Crockett (tfound here as we speak.
I made some changes to Zach's code and while I have it all written, it's a bit late right now to go out and see what data I get back from the car. That and I don't want to start debugging at this point of the night.
I'll see if it works tomorrow and will try and get the code up by the weekend