It’s now official, according to Apple, the MacBook Air is now shipping:
CUPERTINO, California—January 30, 2008—Apple® today announced that MacBook Air™, the world’s thinnest notebook, is now shipping. MacBook Air measures an unprecedented 0.16-inches at its thinnest point, while its maximum height of 0.76-inches is less than the thinnest point on competing notebooks.
It should be in the stores either tomorrow (Thursday) or Friday at the latest (it was originally scheduled for yesterday or today).