So what kind of processor would you expect?
i5 17W in the 11", there's been numerous threads about it, don't know which exact processor though.
i7 25W in the 13", again, don't know about the model but it'll be something like this.
Obviously those are just rumors but it makes sense, removing the nvidia 320m, makes it possible to exchange the 10W cpu c2d processor in the current one and replace it with the 17W snb i5 processor.
the 17W c2d in the current 13" can probably be replaced with the 25W snb without raising the TDP of the air.
Edit:
Core i7-2649m 25W @ 2,3 ghz for the 13"
Core i5-2537 17W @ 1,4 ghz for the 11"
- These are what I'd expect. At least the 2649 as a bto config just like the 2,13 ghz is now with the 13" ultimate.