Now you can with the AirTurn Digit, a new Bluetooth controller that works with your iPad, but your iPhone or Android phone too. In fact, Digit can be used to control a number of Bluetooth enabled devices like cameras, Macs and PCs (depending upon the app).
You can use it as a handheld controller, or plug two pedals into it and turn your pages back and forth or up and down. I think this could be really cool for a club band to control effects or lights as well as the above mentioned applications, and although I don't see any applicable apps on their site at the moment, you have to think that this will happen over time.
The AirTurn Digit sells for $79.95, and the BT two pedal setup sells for $129.95. A four pedal version is also available.