On April 25-28 there's going to be the FIRST robotics championship, where
over 450 high school robotics teams will be present. The competition is
going to be held in the Edward Jones Dome. Each team has 1-2 programmers,
so some of them are bound to know about ROS. I know I will be there, and I
have decent ROS experience; I'm from Team 3142. Email me if you want any
more information about my team or the competition in general.

From,
    Max