For those who have been asking about the digital copies of Onyx, both Amazon and B&N have it up for pre-order now. You can do so by clicking on either link.
Onyx is set for a release on August 14, 2012, which is the official release date.
It may release early in print and digital. Or print may release early and digital not until the 14th. Or it may not. There's no way of really telling sometimes.
Get ready! Onyx is almost here!