Techiton

Intel is soon going to be bringing the fastest mobile processors, it's first of the Core-i7 for notebooks. There are three processors in this list and all three are Quad-cores based on the Nehalem microarchitecture.

The first two codenamed Clarksfield is a high-voltage 45 nanometer chip - Core i7-720QM and 820QM.
The Core i7-720QM is clocked at 1.6 GigaHertz has 6 MegaBytes of Cache while Core i7-820QM is clocked at 1.8 GigaHertz with 8 MegaBytes of Cache. Both with a power consumption rating of 45 Watts.
The third and the fastest is the Extreme edition Core-i7 920XM which is clocked at 2 GigaHertz with 8 MegaBytes of cache and a power rating of 55 Watts.

It comes with Intel's TurboBoost technology which auto-overclocks the CPU to increase performance.
Expect these processors to be released around October, 2009. Detailed specs and prices of these chips are listed below.

Update Sunday, September 27, 2009
Intel has released all the three processors last week, check out the reviews below:
Legit Reviews - Intel Core i7 Goes Mobile - Core i7-920XM 'Clarksfield' CPU Review
HotHardware - Intel Core i7 Mobile CPU (Clarksfield) Review

Core i7-720QM Specifications:
Speed: 1.60 GHz
Turbo Speed: 2.80 GHz
Cores: 4
Cache Size: 6 MB
Bus Speed: 1333 MHz
Power TDP: 45 W
Price: $364

Core i7-820QM Specifications:
Speed: 1.80 GHz
Turbo Speed: 3.06 GHz
Cores: 4
Cache Size: 8 MB
Bus Speed: 1333 MHz
Power TDP: 45 W
Price: $546

Core i7-920XM Specifications:
Speed: 2.00 GHz
Turbo Speed: 3.20 GHz
Cores: 4
Cache Size: 8 MB
Bus Speed: 1333 MHz
Power TDP: 55 W
Price: $1054

For the latest price update, please check this page.