1TB Barracuda 7200.10 are the SATA-equipped Barracuda 7200.11 for consumers and business class Barracuda ES.2 with SAS interface. This time however, Seagate had the good manners to at least provide a date and price: Q3 and $399.99. Right, exactly the same price as Hitachi's 7K1000.
Update: Seagate just gave us some clarification on the 7200.10 vs. 7200.11: "The 7200.10 that was announced was a 250GB single-platter design; the purpose of it was to leverage the new areal densities we achieved and put it into the current 7200.10 chassis with the core electronics. It is shipping today. The 7200.11 and ES.2 use the same areal densities but are a new generation design with updated electronics, etc." So there you have it.