At least in Orlando, the new Bank of America ATMs have a slot loading mechanism that takes your card in automatically (as in, you gently place the card in the slot and a motorized mechanism pulls it in).

I wasn't sure of the reasoning for this initially, but my assumption is that it makes it more difficult to skim. The actual 'swipe' in which the mag strip is read seems to occur inside the machine, so a skimmer would need to be mounted with the machine opened up.