Which Alpine Head Units Work With the KCA-420I Alpine to Ipod Interface?

Which Alpine headunits are compatible with the KCA-420I Alpine-to-Ipod interface? Alpine states on page 6 of the KCA-420I’s owner’s manual that it will only work with 2004 and up AI-NET compatible head units. Here’s a list of the head units Alpine says are compatible:

There’s a thread on iPodLounge where people who have installed the KCA-420I discuss their experiences. Some of them got the KCA-420I to work with older AI-NET head units that are not in Alpine’s list. Some of the head units that worked: