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I (jokingly) guessed it might be an early 22mm Montevina, but they have larger caches:

SL9400 (1.86GHz, 6MB, 17W, 1,066MHz FSB)
SL9300 (1.6GHz, 6MB, 17W, 1,066MHz FSB)

Doing a 22mm Memrom would have helped Intel validate the packaging.
 
AnandTech: Uncovering Intel's Custom CPU for Apple UPDATED

It appears that AnandTech has done a bit more digging about which processor is used in the MacBook Air.

Take a look at this article.

They also discuss the specifications and its intended market. A nice read.

Enjoy :)
 
I'm still waiting for a CPU-Z or Intel CPUID report in OS X. Apple's Developer Notes do mention SSE4.

In that case it it shouldn't be a Merom but I still think it is. I doubt it is a mobile Penryn though but nontheless it is interesting :D
 
Actually it mentions SSSE4, which is likely a typo (note that Merom has SSE3 and SSSE3).
 
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