For now, though, you can play with the unit tests and see what can be done. It's preliminary but working and the API will evolve as we get feedback from the community. We'll be discussing how best to expose this functionality without needing to know all that much about grizzly internals. We'll be looking at other cases such as jetty and atmosphere to make sure we can provide a smooth, useful API that most people are comfortable with. There's been talk at various levels of building some form of standard interface to plug in to various websockets implementations on the server side but until then, we'd love your help in building something with grizzly and glassfish that we can all use.
So please join us on the mailing lists and give us a hand.