It may be more than just the stereos from iHome, but it seems like the iPhone is NOT COMPATIBLE with these home stereo solutions for iPods.
*EDIT* Other Replies below here indicate this may be a user-issue, i.e. I am a tool and couldn't figure it out. The bottom line is SAY 'NO' WHEN IT COMES TO THE AIRPLANE MODE QUESTION!
http://www.ihomeaudio.com/prodShelf.asp?dept_id=1006
Today I hooked up my iPhone to my friend's iHome system. We were using his iPod until I showed up with all the music. I plugged my iPhone in. My iPhone immediately displayed something about it not being supported and asked if I wanted to enable Airplane Mode in order to avoid interference. I said yes, but it didn't matter. It just plain didn't work. My iPhone was playing but nothing was coming out.

I'm really bummed now.. Why couldn't it be just like the iPod, complete with compatibility and also a moutable disk!
*EDIT* Other Replies below here indicate this may be a user-issue, i.e. I am a tool and couldn't figure it out. The bottom line is SAY 'NO' WHEN IT COMES TO THE AIRPLANE MODE QUESTION!

http://www.ihomeaudio.com/prodShelf.asp?dept_id=1006

Today I hooked up my iPhone to my friend's iHome system. We were using his iPod until I showed up with all the music. I plugged my iPhone in. My iPhone immediately displayed something about it not being supported and asked if I wanted to enable Airplane Mode in order to avoid interference. I said yes, but it didn't matter. It just plain didn't work. My iPhone was playing but nothing was coming out.

I'm really bummed now.. Why couldn't it be just like the iPod, complete with compatibility and also a moutable disk!