Here's something cool:
http://emaculation.com/forum/viewtopic.php?f=7&t=8288
It's a Mac II emulator that can actually boot A/UX. That's something that has never been possible 'till now. It's also something that a lot of people have long wanted to run in an emulator!
Just a 0.0.1 version on github right now, but it looks really promising. There are a few screenshots now:

