nihilcat commented on Steam today, stating 150 bugs were addressed last week and are currently with QA and that Beta is just awaiting a green light from QA.
I'm guessing there may be some feedback from QA that will need solving, but my speculation would be that Beta is imminent.
nihilcat stated he is very tired. Understandably, as I think he may be the only programmer. He may also be the sole PR department as the best English speaker. Hence the spartan news releases.
Anyway nihilcat, if you read this
All good things are worth waiting for.