An anonymous tipster has sent an image to our friends across the hall at the Engadget HQ and what a treat it is. The image appears to be of the upcoming MacBook Air that is likely to be announced at Wednesdays "Back to the Mac" event.
Features include a re-designed case, more internal room for battery packs, and a 0GB hard drive. Wait, what? In this particular example, there doesn't appear to be a hard drive. This leaves us to speculate that there must be multiple models of the Air and this particular SKU is probably making use of some sort of flash-based storage device.
The MacBook Air hasn't r
