First of all, I want to mention that controlling anything show-critical over wifi is a bad idea. A really bad idea.
But assuming you know those risks and are willing to take them, your best bet would probably be a lightweight piece of software that will communicate with Qlab over OSC. I develop for iOS, so PM me if you you're interested in making this a reality.
It would also help to know what exactly you'll be using this for, as there might be a more reliable solution that would work for your situation.
Result report:
This ended up using the qlab remote app on an iPad.
Since figure 53 does not recommend running a show with the app I did a lot of testing and found that with the computer on the side of the stage (Maximum 5 meters from iPad)with a free line of sight to the actor running the show I had no problems at all. The computer was a MacBook PRO with a network created in the computer with no external router.
