Squeak is not avaliable on the ppc platform. The codebase should work because squeak will work in OSX, but an ebuild doesn't exist yet. I am assuming this is because no one has expressed any interest yet but who knows. Currently there is only a ~x86 ebuild.
Steps to Reproduce:
Tested and added the latest squeak and squeak-vm to ~ppc.
I think, it shoulb stay ~ppc, as it is not stable on x86 yet...