TCS Students and Alumni are working on a Davis Mesh network. Follow their progress at http://mesh.technoculture.us
TCS Student Kevin Corcoran's work can be found here.
TCS Student Tim Kerbavaz built a PirateBox portable file sharing system.
TCS Students Todd Kaiser, Andrew Florio, Tim Kerbavaz, Ngoc Le, Reid Hartz, and Alex Yang produced this video for a TCS 152 Class: