An increasing number of popular conferencing applications operate in a lightweight, infrastructure-independent ad hoc fashion. These P2P-type systems raise the demand for scalable, adaptive self organization of conferencing in a standard-compliant way. We present a SIP-based approach to scalable distributed conference management in a Peer-to-Peer environment. The protocol distributes locators for a conference focus in a transparent fashion and makes use of the P2PSIP overlay to virtualize the focus identifier.