In no particular order:

 * Daniel Jacobowitz <dan@debian.org> for Debian packaging, advice and busybox help.
 * Benjamin Herrenschmidt <bh40@calva.net> for yaboot and great work on the kernel.
 * Chris Emerson <cemerson@chiark.greenend.org.uk> for the Forth code in ofboot.
 * iNOUE Koich! <inoue@ma.ns.musashi-tech.ac.jp> for advice and help [re]writing ofboot's Forth code.
 * Eric Peden <ericpeden@homemail.com> for writing the yaboot FAQ.
 * Nicholas Humfrey <njh399@ecs.soton.ac.uk> for the badge icons in ofboot.
 * Brad Midgley <brad@turbolinux.com> for Turbolinux/RPM packaging.
 * Olaf Hering <olh@suse.de> for figuring out how to map SCSI /dev nodes to OF paths. 
 * Josh Huber <huber@mclinux.com> for PowerBook1998 ofpath support.
 * Ian the T <ian@iantheterrible.com> for donating shell access to add 8600 support to ofpath. 
 * anyone i left out!
