Here’s the quote from Blizzard:

Blizzard Entertainment is proud to announce the 2012 Battle.net World Championship, a major global eSports event featuring some of the best pro-gaming competition in the world. Slated to take place in Asia toward the end of 2012, the Battle.net World Championship will host this year’s StarCraft II and World of Warcraft Arena World Championship tournaments. Blizzard gamers and eSports fans from around the world will be invited to attend and witness some of the most skilled pro players on the planet battle it out for cash and glory.

We’re excited to be showcasing Blizzard eSports on a truly global stage this year. We’re also heavily focused on getting Diablo III, Mists of Pandaria, and Heart of the Swarm into players’ hands as soon as possible. In light of our jam-packed schedule, we’ve decided to hold the next BlizzCon in 2013.

More details about the 2012 Battle.net World Championship and BlizzCon 2013, including specific dates and locations, will be coming in the months ahead.

This seems a little odd to me, why completely cancel an extremely popular event. It’s not cheap to host/set-up but it’s great advertising and people are more than willing to pay the hefty fees to attend.
Hopefully though, this will result in us getting Diablo III, Heart of the Swarm and Project: Titan a lot earlier. But this is Blizzard we’re talking about, anything can happen.

More news when we have it!

While working on Diablo III we’ve been called out for messing around with systems too much, that the game is good as-is and we should just release it. I think that’s a fair argument to make, but I also think it’s incorrect. Our job isn’t just to put out a game, it’s to release the next Diablo game. No one will remember if the game is late, only if it’s great. We trust in our ability to put out a great game, but we’re not quite there yet. In addition to finishing and polishing the content of the game we’re continuing to iterate on some of the core game systems. So all that said, I’d like to provide everyone an update on some of the systems we’re currently working on.

There’s much reading to be done, I find it extremely interesting (I particularly like the decision to remove Scrolls of Identification) and Blizzard are doing a good job of keeping the Diablo III hype-machine running at full capacity.

You can read the full blog here:
http://us.battle.net/d3/en/blog/4325959/Systems_Changes-1_19_2012#blog

As soon as there’s a release date (or even just a release “window”) I’ll let you know.

There’s no mention of which consoles but I think the Xbox 360 and PS3 are a safe bet.

Source:
https://twitter.com/#!/Bashiok/status/156215812473098240

We’ll be sure to post more news regarding all things Diablo 3 as soon as we have it.