There was a thread a little while back concerning high-speed internet at WDW and the overall thought was Disney probably isn't in a hurry to add high-speed internet. There probably isn't a huge incentive/demand for Disney to incur this cost - and it would be pretty costly for them. Disney sells escaping the real world. So they have that backing their not adding the cost. And if you think about the overall guest makeup, there's probably not that many of us geeks that take their laptops on vacation.
Wireless would be a step after high speed. So we're probably looking pretty far out for wireless high speed access at Disney.