What’s up with the MacBook Air?

The road warrior’s favorite Apple AAPL notebook, pulled with great fanfare from an interoffice envelope by Steve Jobs at Macworld 2008, is being steeply discounted this weekend, on the eve of Macworld 2009.

The entry level machine (1.6 GHz, 2GB) is still listed on the Apple Store at its original price — albeit with a 50% larger hard drive and a new graphics chipset. But if you act quickly, you can get it for a lot less.

A quick Sunday-morning survey turned up a wide range of prices:

*Note that MacMall — which tosses in a free Epson printer, a free USB hub, free Parallels, free Toast and free shipping — has scheduled its sale to end Monday at 11:59 p.m. PST, nine hours before the start of Phil Schiller’s Macworld keynote.

Could Schiller have a MacBook Air upgrade up his sleeve?