PS3 uses PowerPC. The last version of Fedora that supports PPC is F12. Below is one of the mirror:
http://ftp.riken.jp/Linux/fedora/rel...edora/ppc/iso/. Having said that, I have not tried this version on PS3 yet. I am still running older version on my fat PS3 stuck at FW 3.15

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The PPC support is dropped since F13.
http://fedoraproject.org/wiki/Fedora...wer_PC_Support. I hope with the renew "interest" in the PS3 Scene, the Fedora Project will support PPC again in the future but I won't hold my breath for that.
If you want to use more recent kernel, your best bet I think is to get Debian instead. My 2c.