While we're all on the nostalgia kick - I only recently learned that parts of the System 7.1.1 source code had leaked a few years ago (notably the Toolbox stuff that went in ROM). That stuff was a fascinating read. Seeing source comments signed by Andy Herzfeld, Steve Capps, Bruce Horn and Larry Kenyon and dating back to before the Mac was even released (and lining them up with folklore.org stories) was amazingly nostalgic.

Here's a changelog line from the SystemSounds.r Rez resource file many of you might recognize the story behind...

    <3>	 3/28/91	DTY	Change the name of “Xylophone” to “Sosumi”.