The Penryn speeds are as follows:
X9000 2.8 GHz, 44W, 6MB Cache
T9500 2.6 GHz, 35W, 6MB Cache
T9300 2.5 GHz, 35W, 6MB Cache
T8300 2.4 GHz, 35W, 3MB Cache
T8100 2.1 GHz, 35W, 3MB Cache
The rumoured processors for the Macbook Pro's are the T9300 2.5GHz and the T9500 2.6GHz but I don't think this will offer a large enough gap for the different prices of the Macbook pro's.