1. node.js support is coming soon!
2. We're going to have at least one self-hosted real-time push solution in our app store (think Socket.io or Faye).
3. The whole reason we started Cloud 66 is to give developers more control over what traditional PaaS doesn't let you do. It's your server, you have full root shell access to it. If we don't do it (yet), you can always do it yourself!