There seems to be more confirmation of the rumors suggesting that the Droid Bionic will go on-sale on September 8th. A device that is suspected to be the Bionic, just showed up in Best Buy's database system. Furthermore, it indicates that the device will be in-stock on September 7th. Interestingly, this story had to be "pieced together" to make all the connections. The phone in Best Buy's database doesn't actually say it is the Droid Bionic; however, the SKU on the device is the same as an image for the Droid Bionic that showed up in a Best Buy catalog previously. It still could turn out to be a "false lead", but the signs are starting to line up.
Source: BionicForums.net via AndroidPolice and DroidAttic