I'm sitting here on the train and working on my lovely lovely lovely Lenovo X61s running it's cellular modem. Yes it's bloody expensive, but it's life blood! Worth every drop of the $60 a month I pay. And I'm wondering, WHAT besides Mac OS X does this give up to an Apple MBAir? Nothing. And it's a 4 year old design at least.
Apple HAS to launch a MacBook with built-in cellular modem or at least a slot on June 9. HOW can it be called the Air if it has to use a modem with a dongle??!!