Hi,A quick note: boinc-app-seti still refuse to build on powerpc, so I applied a patch in the git repo [1], which will solve this problem.
[1] http://anonscm.debian.org/gitweb/?p=pkg-boinc/boinc-app-seti.git;a=commit;h=ae41c202a6a3ba2cfd3d84bcd01a7d371ab58c13
Cheers, Guo Yixuan