Unofficial post by Aphel of mmowned.com
The source is a model editor and coder who has very, very good info. He had the Wrath dates and the Cata build updates days weeks before they were officially announced. His credibility thus far has been excellent, especially regarding lore predictions.
This just in! We have information from a reliable source that Cataclysm will launch 73 days from the current date. This means that Cataclysm may be released on November 18, 2010. While this is not an official announcement from Blizzard, we have good reason to believe that Cataclysm will be released anywhere between November 14th-18th. This means that we could see Patch 3.9 in mid to late September.
Patch 3.9 will launch all of the new 1-60 content, the new class/race combos (except Goblin and Worgen), and a host of pre-events that will culminate in Deathwing's emergence.
Tune in to MMOwned for more updates!
Note that this is NOT an official Blizzard news release. This is speculation from a very trusted source.
I hope this pans out, Blizzard hasn't done anything/mentioned the live version forever.