I don't think the TC30 or the Harmonys have a database you can just look at to see what's supported. At worse case you can just have the TC30 learn the commands from the original remote. You would create an activity to get you devices in the right settings for the iPod dock. The next screen that shows up on the remote you can customize the LCD screen buttons to say and do anything you want. As long as your iPod dock remote is IR and RF. I have the Kennsington Dock which is RF so I have an activity on my TC30 to turn the Amp on and go to the right input, then I use the RF remote for the dock. I like the trade off because of the RF remote I can control things while out on the deck and all the hardware is inside. For the Kenssington RF I can control volume, play/pause and skip songs. This works great to put the iPod in shuffle and just adjust volume or skip a song I don't want to hear.