I've been posting in MR for a week now as I'm waiting for the Mbp update aswell. Till now my predictions worked fine.
As I've been saying in other posts, the BestBuy part numbers are not about Time Capsule. For 2 reasons:
1) The price don't match.
2) Time Capsule has been announced. We are just waiting them for ship. But tuesday is not about announce shipments but new products. Besides, the Time Capsule shipment is, in most cases, expected to the 29th February as we can read here:
http://www.tuaw.com/2008/02/25/time-capsule-in-this-weeks-best-buy-flyer/
The Bestbuy part numbers are also not about the Macbooks. For 3 reasons:
1) The price don't match.
2) Macbook was updated in November. Mbp wasn't.
3) If Apple meant to update the Macbook tomorrow, it would update with a penryn processor and a multitouch trackpad. Can you imagine the Macbooks having a better processor and technologies than the Pro's machines? Me neither...
Tomorrow is about MBP!
I think /A means that there is different guts. I doubt the case will change much. They didnt change it for intel, why would they change it for a new mobo/cpu.
When Apple realized the Mba, it choosed a certain logic of design: thinner, multitouch trackpad, black backlight keyboard,... Whether you like it or not...
This logic will likely be followed by the next Apple products such as the Mbp.
This way Apple will be shared whitin 2 destingued logical designs: the design for most of consumers (Macbooks) and the design for the Pro's (MBA and MBP).
I mean I guess, since MBA was meant to be a travel-machine, it was meant to be for the Pro's and that's why it has the aluminium case and that's why I rather that the MBA has already the futur logic Pro design in it.