Wes,
I just purchased iLinc Pro, and wrote a generally favorable review for the App Store.
One thing I did mention, however, is that you really have to implement folder support. I have over 100 devices, and it's a major pain to find them in the list (which is way too long since every button on a Keypad is listed as a separate device!). Ditto for scenes.
However, if the initial screen of Ilinc had an iPhone spinner thing listing each of the rooms I have set up, and after choosing a room, I would see just the devices and scenes for that room, then this app would really rock. The ISY folder information is available in the REST/nodes output, so it should be doable to gather this information into iLinc.
In the mean time, thanks for putting control of all my lights "in the palm of my hand"!