DVD deltaisos for Fedora 12-RC.1 -> 12-RC.3 for each of i386, ppc, and x86_64 are now available at http://thepiratebay.org/user/andre14965/ The sizes are 2.6%, 4.0%, and 1.7% of the full 12-RC.1 ISO size, resp. The time to run applydeltaiso is approximately 3 minutes. WARNING: I just discovered that using these currently works only on Fedora 11 and below, not on Fedora 12/Rawhide, where applydeltaiso will fail with an "md5sum mismatch, iso is corrupt" error. Sorry for not catching this earlier. This is due to the presence of xz-compressed noarch RPMs built on PPC hosts before the xz endianness bug was fixed (around October 7). I hope it's not too long before all of these get rebuilt.