In the market for a MacBook Air? Well, now may not be the best time. Apple Insider is reporting indirect sales channels (read: non-Apple stores) are running out of the thin-and-light with no indication of a replenishment. Indeed, we just checked Amazon, Best Buy, and a few other online retailers and were consistently greeted by limited- and out-of-stock notices. So, you know what the means -- new hardware rumors. Or rather, old ones resurfacing, such as the 11.6-inch display from late September. Co