There is a very "atmospheric" female voice saying "Initiating Start-up sequence" during the boot-up of Knoppix. This is interesting because, as I've been told, linux has no true startup-sequence file, but, obviously, the Amiga does. She also speaks when the system shuts down. She was present on 3.2 and the recently released version 5.
Anyway, she's worth a listen. I think the 3.2 splash screen is cool, too.