It would be nice for libreoffice-bin to have binaries for ppc/ppc64.
I recently got myself a powerbook g4 and it takes painfully long to build libreoffice from source (even when compiling c++ sources through distcc).
I have an account on a G5 server with KVM in about two weeks, so if no one is willing, I would be willing to build the binaries there in a virtual gentoo.
Checked with ppc team and they sadly have no resources for this.
So sorry but this bug is cantfix.