Hi brokenvail - Yes, I saw the post about TouchOSC and the 'Missing Link'. I had one here for a few days that a Beta tester kindly lent me, and I had issues with receiving SYSEX messages via the device. I checked with the manufacturers, and they told me that the Missing Link didn't support returned SYSEX. Also, the device only supports OSC, so I would have had to build in a whole MIDI -> OSC conversion engine in the software, which is no trivial task.
Still, I wouldn't rule it out altogether. Wireless seems to be a high priority with AxePad users and potential users, so it might be something I will revisit again as wireless hardware improves over time. If you know someone who has established two way sysex conversations with the Missing Link, let me know!
As for what we have done wirelessly so far, I've put most of the details on our web site already:
Wirelessly connecting AxePad to your Axe-FX | AxePad
You will basically need the iPad running AxePad, but also another iOS device (iPad/iPhone/iPos) that will act as the 'receiver' and be hard connected to the Axe-FX. Surprising how many people out there have an older iPhone or a second iPod lying around!
In a nutshell, you will need to be running an app called MIDIBridge on both devices (I think it is around $10 - if both devices are linked to the same iTunes account, you only need to but the app ONCE and load it onto both devices).
MIDIBridge basically acts as the wireless link between the two iOS devices. The only other caveat is that the devices don't actually talk directly to each other, but do so via a wireless router, so you will need to ensure that your venue has a wireless router and you can join up to.
Detailed step by step on setting up MIDIBridge etc. is on the above link at our website. Our examples there has the iPhone device using the iRig MIDI connector, but we've also done it using the Camera Kit plus USB MIDI cable.