Data format and interface for external P2P mode

Last month, Henning and I submitted an internet-draft on "Data format and interface to an external peer-to-peer network for SIP location service". The text and HTML version are available. The idea is to use an interoperable XML format for accessing the DHT (which is based on OpenDHT's interface) and an XML format for storing user location data such as contact address, cryptographic keys and certificates, offline messages, presence watcher information, etc.