I just stumbled upon a couple of interesting articles that prove how the Air is not only NOT the thinnest laptop ever, but also how Apple were not the first going for thin laptops (so much for their "thinnovation", huh?):
1. The thinnest laptop ever comes from Sharp, with the Actius MM10/Muramasa notebook, which measured 0.54 inch thick and hit the shelves in 2003.
2. Before that, the thinnest laptop had been the 0.7244 inch thick Pedion, a joint project of Mitsubishi and HP, developed way back in 1997 and released by Mitsubishi in 1998. Unfortunately it made too many compromises for it's time (no optical drive in 1998 was crazy, lol), and died a quick, ugly death shortly after.
So, as you can see, the Air's "0.76 inch thick on the thickest end" does not make the thinnest laptop ever. Probably there were other laptops thinner than the Air in the past, but similarly to these 2, they might now be forgotten.
Anyway, has anyone seen the new 0.7 inch thick Voodoo Envy 133? That thing looks sexy! (and yes, it's thinner than the Air

)