B. Mann Consulting

The Peer Distributed Transfer Protocol, or PDTP, is a project to define a replacement for the venerable FTP protocol. PDTP is similar to BitTorrent in the way it handles distributed streams, but also manages a directory hierarchy automatically and includes other interesting features such as metadata rich directory listings and support for file integrity validation through the use of DSS signatures. The project proposes three use cases for increasing scale.
Windley's Enterprise Computing: Replacing FTP: The Peer Distributed Transfer Protocol (PDTP)

If PDTP gets going, it looks like it could rival BitTorrent. I'm all for getting rid of FTP as soon as possible. For BitTorrent, we probably still need a "nice" option that lets you specify a percentage of bandwidth to use…I need some left over to make and receive VoIP calls!