Intel plans to release a bunch of 45nm mobile chips at CES and the top one, branded X9000, will work at an amazing 2.8GHz. This will be a chip for enthusiasts who will spend a bunch of money on these super expensive machines, and this is the best Intel has to offer this year.
The new mobile chip has 6MB of cache memory, works at 800MHz FSB and works with 0.5 to 1.5V voltages. It uses uFCPGA8 / Socket P, and if you want thousands of them you will pay something close to $827 for one.
Clockwise, this chip is the same as X7900, but the new Wolfdale core has 6MB of cache and support for SSE4 that can speed up some operations. The X9000 should be close to 45W TDP, which is a top for these high-end mobile extreme chips.