For clarification:
ALL WDW resort rooms are now equipped with wired high-speed internet. Cost is $9.99 per 24-hour period, and you do not have to go anywhere or do anything to turn it on, just connect your laptop, open your web browser, and the sign-up page will automatically come up. At the end of your 24-hour period, the sign-up page will come up again and you can pay for another 24-hour period, or not.
I typically enable it one or maybe two days during a weeklong stay.
Cables are provided (though like everything else in a hotel room, once in a while they walk off with the previous Guest).
Wireless internet access is provided in the public areas at some (not all) WDW resorts, mostly those with convention facilities. Again, it ain't free - cost is $4.99 for the first hour or $9.99 for 24 hours.