Well, actually it is a DVI device. You can get an adapter from Apple for a DVI output. Turns out, works just fine with the DVI Extender. I discovered the 30 pin plug on my iPad is a little flakey. Wiggle it just right and everything works.
As long as you have a DVI output on your IPad and buy the right type of DVI Extender I don't see any issues. All a DVI Extender does is allow you to extend the distance between your DVI source and display.