I'm having a really hard time finding out what model SSD the MBA uses. I'm wondering if it might actually be the SanDisk UATA, which maxes out at 64GB. I'd just be a bit surprised if they passed up the 72GB if it was an option, unless it was a lot more expensive. It just seems like the closer they get to offering an 80GB HDD or and ~80GB SDD, the easier it is for people to compare it and now have to weigh the loss of storage space, and therefore more readily pay to upgrade.