August 5thcan't get here any sooner!
drooooooool
ICK. Disgusting. Let's keep the MBA and MBP as far away as possible if that is the end result. It's like the worst of both worlds.
Why deviate from the formula? The MBP, magnetic latch and user accessible HD bay aside, needs nothing changed on the exterior. Perhaps a larger trackpad, and I can give or take chiclet keys provided they're in-keeping with current colour scheme (ie not MBA-black). Here's some I made earlier...

Innards... 2.5 and 2.8GHz procs, 250GB and 320GB standard HD space, new GPUs, 1680x1050 standard across the range, with 128GB SSD option on the 2.8s. Weight drop would be good too. And we're set.
For MBA, I'm thinking 2 USBs (or 1xUSB, 1xFW) plus a thinner bezel, resulting in an overall smaller size.

Hopefully in addition to a proc bump better comparable to current MBs, also offering 160GB HDD/128GB SSD and 2 or 4GB RAM options. Swappable battery would be awesome, if not... an extra real world hour or two of juice would be nice.