To answer a couple of questions, sum up some of the things that have been answered in the thread and provide info on which processors these appear to be, I put this together.
Penryn 3M ULV 45nm 3MB cache
Penryn 45nm 6MB cache
RAM on all models is upgradeable to 4GB. 13" has SD slot, 1.6 does not. Processor and RAM upgrades are $100 each. $200 separates each version of the 11 and 13" models for jumping storage space up. So low end 11" is $999, top end 13" w/2.13GHz and 4GB RAM is $1799. Top end model of each screensize only models that allow processor upgrade.
Originally Posted by emack
Why the ancient processors? Where's the i3 through i7's???????????
When Intel actually codes their GPUs to support Open CL and makes them not completely awful (or allows Intel to produce chipsets for the i-series) then we'll see better processors in the smaller Apple notebooks.
Originally Posted by emacs72
the Core i3 330UM and i5 560UM run quite cool when compared against the Core 2 Duo L7000 series. as i mentioned before, Apple probably went for the Core 2 Duo over the ultra low voltage Core i3 / i5 for several reasons, including price.
You're correct, but these are much newer parts than the L7000 series, which were 65nm.