The official announcement has come just a few days after Verizon set up the HTC One signup page. Verizon originally confirmed that the HTC One was on its way with a tweet back in June, and the new announcement for the release date has also come with a tweet. Because of that, there isn't a huge amount of info. The Verizon HTC One will go on sale August 22nd for $199.99 with a new contract.
The tweet also links back to the signup page, so there is likely more info, and perhaps a pre-order on the way for the device.