Today I saw a random person who I didn't recognize wearing an EC shirt. Small world.
I also went to a talk on full-duplex radio, which was absolutely fantastic. Incredibly cool stuff - basically, in analog circuitry before they hit the ADC, they feed in an inverted copy of the TX output wave. There's some fancy adjustments necessary to get it to line up and cancel just right, but properly calibrated, the team has gotten 55dB S/N ratio. Very impressive work.