Last week????
The Seagate "Savvio" range of enterprise 15K rpm 2.5" drives has been out and able to be ordered for some time already.
For example, here's a place with them *in stock* and able to be ordered. (we use this crowd as a supplier)
http://www.dpi.com.au/product/i/246578/n/savvio-15k-2-2-5-73gb-sas.html