Just thought I'd point this out as I think many may have missed this bit...
In the very beginning of the clip there was a male voice asking "what's this?" and a responce by a female voice (both out of frame) saying it's for the dev-update "next week".
This implies that they were nearly 1/2 way done with the 2nd round of polish on the 17th or there-abouts.
So, if we were to say that Christmas was when they decided to do a 2nd round of polish, and Feb 17th is essentially the 1/2 way point of completing that 2nd round, that's 7 weeks and 5 days (54 days) from the 17th that we could be looking at completing that 2nd round, and thereby completing the game (if all goes well!).
The magic number that I come up with is April 11th, 2012. That's where I'm placing my bet. Not saying that "I know" or anything ridiculous, but if I had to wager, that's the date I'd put my money on.
Lots of variables of course, for example, they may have taken the week after Christmas off and started the 2nd round after New Years, (Jan 2nd) which would make the magic date April 3rd. Also, dev's said they're putting extra work on the bosses and the unknown size of the boss act (Act 4) which is supposedly around 1/2 the size of the other Acts, could put the date further back.
Still, I kinda like the date April 11th, feels like I should remember that date for some reason.







