Update: the PiPo SDK v0.2 is now available on Ircam R&D‘s GitHub!
The PiPo module API for writing your own processing and analysis objects is now available and documented here: http://recherche.ircam.fr/equipes/temps-reel/mubu/pipo
It includes an example xcode project to build a simple pipo mxo for Max that also works within MuBu.