[citation][nom]wotan31[/nom]Why? The 320M has much better graphics performance than the i3 or i5 w/ integrated graphics. Also, as a package, the ULV Core 2 Duo consumes *less* power than the newer i3/i5. Lower power consumption, and higher graphics performance. Makes perfect sense, actually. I personally have no plans to buy the Macbook Air, but you have to admit, it's a lot of power crammed into such a slim chassis. Crappy Atom netbooks are thicker than this.[/citation]
Just because Apple used the C2D doesn't mean it's better or consumes less. Also just because the i3M has integrated graphics doesn't mean that you can't use another graphics chip. Also the i3 consumes less power than the equivalent C2D the SL9600. The max TDP of the i3-330UM is just 1w higher than the SL9600. The difference is that the i3 has an integrated graphics and north bridge, or did you forgot that the Arrandale has memory controller, PCI Express, DMI,...