Honestly: I simply don't know, plus even if I shared any of my personal *assumptions* people might easily misinterpret them and they wouldn't be helpful anyway ("Probably less than four months." - "What, we might have to wait for four more months?!" - "Either that, or less, or maybe even more". See? Doesn't make sense).

Yes, I'm of course drawing my personal conclusions (maybe better: assumptions) as I have access to some internal stuff or can read some internal comments, but I don't know any dates. Dates would not make much sense anyway, because plans can always change (cf. time-based vs feature-based release schedules).
Normally Nokia tells me a little bit in advance about an upcoming public update (which is totally fine and enough time) so I can come up with a ChangeLog and get my stuff prepared.

So far public ChangeLog creation has always been quite a mess because of the 2 or 3 weeks difference between internal packaging of an update and its public release (mentioned already in an earlier comment in this thread):
I marked bugs as FIXED in bugs.maemo.org but they were fixed in a later internal version *after* the public update was packaged. Sorting that out for the ChangeLog was lots of manual work.

In a naive attempt to avoid that mess this time I started to mark
those bugs that are definitely in for the next update earlier already (well: yesterday). Crossing fingers that this helps me saving some time - Time will tell.