grand challenges: highlights of two i care about (still from nsf workshop report april 2003) 1) Internet information theory holy grail: Internet Erlang for wireless too 2) overlay networks all getting along, even economically 3) network economic theory (network markets) whole slide on this one (next) 4) resilient networking whole slide on this one (next+1) 5) sensorized universe security, health, education, battlefield, traffic, law holy grail: `ubiquitous safety net' (emergency response system) less holy grail: bigbrothernet 6) virtual networks VPNs, mobility, automatic team discovery/creation, cognitive networking