Palantir: Streaming media over the rweb

freshmeat.net: Project details for Palantir
Palantir is a client-server streaming system designed to transmit live video, audio, and data over a TCP/IP network. The server runs on a Linux box. The supplied Java client can display the live video stream as well as interact with hardware devices connected to the server. A native Windows client also allows full-duplex audio communications with the server.