I went back through the IIci hack thread to see if I wrote about the LC III ROM, but couldn't find anything (P.S. after reading, I learned that today is the 1-year anniversary of getting sampled startup chimes working on the IIci!)

I just tried an LC III ROM in a IIci -- you don't get a startup chime but it looks like some of the POST runs. For example, the keyboard lights blink. Eventually after a short delay, you hear the chimes of death and nothing happens after that. I'd love to figure out some way to trace instructions to figure out the code path it takes and where it dies...I suppose MESS could do it.