I'm thinking about getting the MacBook Air. I'll know better after I play with it at the Apple Store in a couple of days. The performance is sufficient for the way I'd be using it. I'd like a bigger disk, so I want to make sure I'll be able to swap disks if a larger one becomes available. (I'm comfortable messing around under the hood.) What I really want to know is if the regular HD can be replaced with the SSD. That is, can I unplug the 80GB HD, and plug in the 64GB SSD? (Or a larger SSD if/when one becomes available that fits in the case.) Has anyone found this information yet? Thanks.