Here is the release from blizzard:

IRVINE, Calif. – July 29, 2008 – Blizzard Entertainment, Inc. today announced that tickets for its third BlizzCon™ gaming convention will go on sale August 11 and that live coverage of the event will be available as an exclusive DIRECTV pay per view event. BlizzCon is a celebration of the [...]

Karune has released his 42nd Q&A session:
—StarCraft II Q&A Batch 42—
1. What was the main reasoning to shifting the Hydralisk backwards one technology level? How does this affect the Zerg early-game, especially since the Zerg will have absolutely no anti-air units before the Hydralisks? (gamereplays.org)
Actually, the Hydralisk has been brought back down to Tier 1.5, [...]

Here is what karune had to say in his new Q&A Batch:

Originally Posted by Karune
Chat with Devs: Since the Worldwide Invitational in Paris, the topic of the new Vespene Gas mechanic has come up a lot across many different fansites and message boards. Thus far, this is one of the biggest changes which will affect [...]

Here are some pics that surfaced after WWI, which break down the current tech tree’s of the Terran, Protoss, and Zerg. Keep in mind that these are subject to change as the game continues to be developed but should for the most part remain the same.

This was posted on the battle.net site:
StarCraft: Brood War and Warcraft III: The Frozen Throne are coming to the 2008 Digital Games worldwide tournament as part of the real-time strategy (RTS) category.
Digital Games is a worldwide online tournament featuring competition in thirteen titles, with the best players receiving permanent online medals. Participants can represent their [...]

http://www.battle.net/forums/thread.aspx?FN=sc2-general&T=1393003&P=1
A blizzard employee said the following about the new features that gas has.
Here is how it works. All numbers are subject to change. We have changed the balance since the WWI build and will be fiddling with the balance this coming week for sure.
You start with two Vespene Geysers in your base and at [...]

Here are all 4 parts of the video where Blizzard’s Development team discuss Starcraft 2 and go over some over it’s features.

Several retailer sites have updated their Starcraft2 information with a release date of 12/3/08. Now, we don’t know if this is official or not, and Blizzard publicly stated that the game will be released when it’s done and that they do not currently have a release date for the game, but who knows what their [...]

Since SCLegacy.com
completed all the requirements for the I <3 SC competition, they were allowed to have some of their questions answered:
1) What is the current state of the Hydralisk? The current stats we have are tier 2-2.5, 100 minerals, 75 gas, 80-90 HP, and 8-10 dmg with no special abilities. Compared to the Roach, the [...]

A new splash screen shows up whenever you access blizzard.com or battle.net. Here it is:

This reminds me alot of when Blizzard announced Starcraft2. If you remember, they reviewed previously released games each day for a week until the announcement of Starcraft2. It really is a good way to build up the hype for a new [...]