Blizzcon is over, so Karune has started his "job" again (that we thank him this way too), so he grabbed up some new information from Dustin, and released Q&A Batch 45. The full article can be found in the official (new) battle.net forums, but let's see some hightlights:

Chat with the devs section:
The Hallucination changed, even units you don't have prerequisite for can be hallucinated:

Karune wrote:Hallucination
The first topic was about hallucination, a classic Protoss ability, that honestly did not get that much use in the original StarCraft. To make it more interesting, Dustin explained how the ability has been brought down in tech to the Nullifier. Additionally, hallucination could be used to create units in which the player doesn’t even have prerequisite buildings for .... - more in the source -

The Queen is like a little Hatchery now:

Karune wrote:Queen Spawns 3 Mutant Larva
The mutant larva count has increased with the latest version of the Queen to encourage more use of a pretty powerful ability if used correctly. Mutant larva crawl around independently of a Hatchery and can create units at a discounted production rate .... - more in the source -

Q&A section:
6 really good questions and answers from several fansites and forum activists. One of them:

Karune wrote:5. Can Allies ‘merge’ their Nydus networks? In other words, can you enter through the Nydus Warren of player A, and exit through the Nydus Worm of player B? (TheWarCenter.net)

No, allies can’t share Nydus networks between networks, but allied units can enter into another ally’s Nydus network.

Extra section called Weekly Blue Roundup:
Karune has collected his answers to the fans' latest questions on the forum, and has made an extra long q&a batch of them. Check it out!

Source: Battle.net forums