Announcement on Carlos' site: http://www.notacloud.com/blog/?p=27

Direct link: http://maemo.org/downloads/os2007_hacker_edition.php

"It’s less than alpha. No Q.A. was done on it and who knows what it might do. It should not brick your device but then again, we can’t be totally sure of that either."

and

"Multimedia is still quite broken, but there’s still hope."

You've been warned!

Edit: It's not a full FIASCO image, so it looks like you'll need to flash the individual components.