I have May2007 "Wheels" mag with the MY08 WRX on the front cover and the 4 page story with it. They state the MY08 will be due out Mid 2008 and the STI not long after that. They state the STI will match the previous model power and torque.

They also say the MY08 WRX has:
168kW @ 5200rpm
306Nm @ 2800rpm

This is what the Mag says so it could all be lies and most of could all change.
Will just have to all wait and see.