Hello ros-users, As part of a summer hack project at Clearpath Robotics, I've released a ROS package [http://wiki.ros.org/vrpn_client_ros] wrapping the VRPN client library. This package provides support for exposing information on VRPN Tracker devices (pose, velocity, acceleration data) into ROS. We've tested it in house with VICON and OptiTrack mocap systems - please keep in mind that neither system exposes velocity or acceleration data over VRPN. Any feedback, bug reports, or validation is greatly appreciated! A list of VRPN supported devices can be found here [ https://github.com/vrpn/vrpn/wiki/Supported-hardware-devices] Paul