BlueAlien.org

With all the rumor and confusion surrounding Toys R' Us breaking the street date of BioShock in a few locations as well as running an add proclaiming the game was "Available now" we decided to contact our 2K Games reps and find out the official story.  The following is their response:

It recently came to 2K Games' attention that one of our retail partners prematurely sold some copies of BioShock prior to the game's official launch date. Retailers are typically shipped product in advance to ensure they can meet launch day demand on street-dated product. As a result, a few people were able to purchase the game early. Additionally, a TV advertisement for BioShock prematurely ran that incorrectly indicated that the game was available for purchase. 2K Games has reached out to our retail partners and is maintaining the street date of August 21st in North America and August 24th in Europe, when BioShock will be available at retailers. 2K Games is appreciative of the gamer excitement and critical acclaim leading up to the title's launch.

It appears all you gamers feverishly awaiting the game will have to hold your breath a few more days.  The 21st will be here before you know it!  ;-)  To tide all you ravenous fans over here is a link to the official art book...  Breaking The Mold: BioShock.