while there isn't a full announcement for it, the current update is actually from 9/20 with a small patch at the turn of the month, so it's only 2 weeks old. that said, progress can be inconsistent, so the next update could be anywhen. but not too soon, since we just got one.
that was the most recent major update. while there have been leaks and such around, we went from 3.0 to 3.2. and the way its been going recently, while i believe sam plans the next update to be a smaller step forward, it could be 6-9 months if we're unlucky.