Q:

Where to host a Ruby app which uses websockets via faye?

No websockets on Heroku,
no thin on Engineyard,
gave OpenShift a try, but they are quite far from being ready for production.

If I want to host a Ruby/Rails app which uses websockets via faye, where can I do that? 

A:

Heroku now supports WebSockets (finally!): https://devcenter.heroku.com/articles/heroku-labs-websockets

