The ATI remote can coexist with the Airboard. I'm guessin gthe imon product also can.
The ATI products allow longer range operation as well as usage from another room (useful for switching MP3's). Or controlling your HTPC if it's behind a cabinet or in a closet.
If a plugin doesn't exist for the application you want to use, you'll need to use uICE or Girder with the ATI remote to remap all of its buttons to do what you want to do. Read Daniel's review.
You're in luck, there's a TheaterTek plugin here:
[Link: remotew.free.fr]Bruno