"...it is confirmed by Taiwanese manufacture that AMD Bulldozer will indeed launch on September 19th 2011."
This is also backed up by AMD themselves, which released a promo video for Bulldozer with a smalle scene with the date Sept. 19th 2011.
In addition, countless other sources are also stating that AMD will also release their Southern Islands GPUs (AMD Radeon HD 7xxx) around September of this year.
Same Date Maybe? Would be a beast of a day for PC gamers.