pdpt.org client, server and library is missing from portage. "The Peer Distributed Transfer Protocol (PDTP) provides a method of transferring files using peers to aid in distribution of content, similar to BitTorrent. PDTP servers export a dynamically changing directory heirarchy, making it somewhat more like HTTP or FTP, and support a number of other features such as metadata rich directory listings and support for file integrity validation through the use of DSS signatures, and large networks designed to replace FTP mirroring." http://pdtp.org/
please reopen this bug when the developers of the upstream packages make releases