I have a 15" PB that I bought in Feb of this year. Its the 1.67GHz model with Superdrive and 64mb 9700. My friend wanted to buy my laptop off of me when he heard about Apple updating the PB's. I told him that if they did a significant CPU update, I would sell him mine. Well, they didn't. But my friend is offering $1500 for mine. The only thing I did to it was add a 1gb ram module so total system memory is 1.5gb. If I did sell it to him, I would buy another 15" model. So the question is, are the new ones worth the extra $500 + tax + memory upgrade I will have to pay? Seems as though the most significant changes are the display and the extra battery life, though both are fine by me on my current machine.