Earlier today we had a rumor that the Droid Bionic might come on August 26th. While there is no confirmation of this, some other signs seem to suggest that it is possible; the newest sign is that ads for the phone have begun showing up in Best Buy's Buyer's Guide. Some of the primary specs have been confirmed by the ad, but it still doesn't give a specific date or price. Regardless, the device showing up in Best Buy fliers is a very good sign!
Source: BionicForums.net and AndroidCentral