We stayed in a penthouse suite in E block two months ago. There was no WIFI available in our room, but I have heard from others that it is available in other areas. Look around the message board - I'm pretty sure I've seen comments about it being available in/around the beachfront suites. When we wanted to use WIFI, we just walked a short hike up near the main lobby and WIFI was available all around the lobby.
Honestly though, I'm so glad we didn't take a laptop - We would not have touched it. We only sought WIFI to make a couple of Skype calls on my iPhone. If you only need limited computer access, just use one of the four computers provided in the game room, just off the lobby.