Intel shows 32nm Clarkdale samples running - The desktop Westmere

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"Clarkdale" is the name of the 32nm desktop variant of "Westmere" cores, which will succeed "Nehalem". For the mobile there will be a similar version called "Arrandale" and the High-end Desktop will be called "Gulftown" and have six cores.

"Clarkdale" and "Arrandale" will have an integrated graphics core on the CPU package, which looks something like the dual die processor on the right:

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This Intel had already disclosed - the processor core will be a dual core capable of running 4 simultaneous threads, manufactured at 32nm, and will be paired with what Intel calls the iGFX, manufactured at 45nm.

The new information is about power consumption: "Clarkdale" should run with a power consumption of about 65W, for the whole platform (running intensive benchmarking, not idling) - motherboard, RAM and CPU/GFX.
Intel has showed this through a small demo, hosted on Youtube:

The motherboard has a very simple design, with only one chipset: the PCH (Platform Controller Hub). It connects through DMI to the processor and PCI-Express will be integrated on the CPU package, allowing for lower latency to the optional graphics cards.
The motherboard demoed by Intel does have two PCI-e slots, hinting at a dual x8 lane configuration for the mainstream-desktop market that "Clarkdale" targets.

Estimated release data for "Clarkdale" and "Arrandale" is the fourth quarter of 2009, while "Gulftown" is expected to debut in the first half of 2010.