Meet the World's First 45nm Processor
 

The world's first working 45nm processors (next generation Intel® Core™2 family processors - codenamed Penryn) are already running multiple operating systems (Windows* Vista*, Mac OS X*, Windows* XP and Linux*) and various applications. Intel is on track for 45nm production in the second half of 2007.

http://www.intel.com/technology/sili...technology.htm