WiMac?

With just days to go before Steve Jobs takes the stage in San Francisco for his annual Macworld Expo keynote, the banners are being hoisted at Moscone Center, the site of next week’s expo. And, as often happens, their ambiguous messages are causing feverish speculation among the Mac faithful. The text on this year’s banners: “There’s something in the air.”

Now, to what could these banners possibly be referring? Streaming iTunes movie rentals to the Apple TV? A genetically modified iVirus? The iSmell? A featherlight subnotebook? Or something else entirely? Say a WiMax-enabled MacBook Pro?