You would probably be better off searching for the ppc version, 'yellowdog-6.0-DVD-ppc.iso' or similar
I have read that they should be the exact same although I have also seen many forum complaints about the 20080205 on PS3. Good luck to you!
[Edit] Also, I used the base repos available through the enhanced user downloads, after updating the links with my user/pass they are working fine. I also seem to be able to connect to those listed above; fedora-extras, livna-stable and dribble are all up.