I'm praying this is already a new MacBook (not Air). I know it's unlikely, but it'd be awesome if it were true. My ex just bought a MB and I would love for it to be "old technology" already 
Should provide a good bit of competition to Dell's netbooks...
i would consider getting one of these if:
1. 10+ battery
2. decent CPU (NO ARM PLEASE - i dont want iOS)
3. +4GB RAM supported.
4. <$1500 price tag.
i think thats reasonable to ask.
I would find this product extremely interesting if it ran an A4 and had a keyboard. But I mean if they are calling it a Macbook, it is unlikely to be an A4 or any ARM processor.
how much is this going to cost compared to a similar spec'd netbook?
i would consider getting one of these if:
1. 10+ battery
2. decent CPU (NO ARM PLEASE - i dont want iOS)
The iPad took a nice chunk out of the netbook market, and Id love to see Apple do so even further with an 11 inch MBA. I coudnt see it getting any "thinner", while holding a much needed spec bump. For heavens sake, give it a 720p screen (great PPI at that size), ULV i3 varient (most likely C2D though), 2 USB ports (this time), nVidia graphics of base MBP, and a standard SSD (128 GB)...drum role please: all starting at 899.99.
Sorry folks, I should learn to not do acid and write comments at the same time...of course its gonna cost an arm and a leg.