I missed this one somehow, a new Internet draft of the JXTA v1.0 Protocols Specification.

The JXTA protocols are a set of six protocols that have been specifically designed for ad hoc, pervasive, and multi-hop peer-to- peer (P2P) network computing. Using the JXTA protocols, peers can cooperate to form self-organized and self-configured peer groups independent of their positions in the network (edges, firewalls, network address translators, public vs. private address spaces), and without the need of a centralized management infrastructure.