I rebuilt Caolan's package for OpenOffice 1.9.77 from
http://people.redhat.com/caolanm/openoffice.org2/SRPMS/ on PPC.
It's in a yum repo at
ftp://ftp.uk.linux.org/pub/linux/fedora-ppc/OOo2/
It seems to work for me at first glance -- more testing could be useful.
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dwmw2