1) Take a look at messaging ordering on the user's manual.
You could also disable buffering at the client side by setting windowSize to 0, look at no-consumer-buffering example for that.
2) All I can say now is we are trying to put it out very soon. You could follow the roadmap on JIRA.
2) also.. It's not a promise.. but we are trying in 4 to 6 weeks.