CEO Paul Otellini confirmed that Ivy Bridge 22 nm processor volume production has already begun. Intel would only consider a production process volume production if it affects "millions" of processors.
Intel Ivy Bridge CPUs should be selling in volume by March 2012. Intel has updated their roadmap with their 14nm skylake and 10 skymont CPUs appearing by 2016.
Wikipedia's list of Intel CPU chips including the announced future chips.
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