Bitcoin related question... how will ATM's work exactly?

[notig]

Here is what I mean.... when you use an ATM will it be connected through internet to an exchange that will allow you to buy bitcoins at whatever the current price is? Or will they simply be "stocked" with bitcoins and the stocker of the bitcoins absorbs the risk for selling them through the ATM?

if it is done wirelessly, in that way won't an ATM basically be a "node" of sorts for an exchange where their balance of money in dollars would now essentially be stored remotely at ATM's as well as however they centrally store it now?