I still don't need a SD card slot.....
My MBA is what it is, I think it is perfect. When I need to install software like Lepoard, I connect it to my LED Cinema display and the Super Drive is connected to it. I install it. I never need the optical drive, I don't see where I need the SD Drive. Even the 128Gb Hard drive is fine, mine is half full with a VM of XP and all my iTunes content even. Hell my printer has a SD card slot and I have NEVER used it.....