Doesn't PDAnet use software on the pc to work?
can that software be installed onto the ipad, if not then you wouldn't be able to tether.
^^ What he said. It's all based on if you can install the software on the iPad.
On my laptop, I run the PDANet desktop software which basically just shows as another type of network connection I can use. I think I also had to get EasyTether on my Droid to get it all running.
You might try just using your Wi-Fi hotspot on the X. The iPad should recognize it as just a standard wi-fi connection without any special software.