I've posted a bunch of teaser videos of the Solo swarming we do often at 3DR, but have not yet posted instructions on how to do it yourself -- I was just waiting for the team to document the steps. Well good news: now they have!
The above video (sorry for the shaky camera -- we were excited) shows a fun exercise in in using the Solo drones to autonomously play Pong with themselves. Each "paddle" is made up of two Solos. The "ball" is the fifth. All this is automatically controlled by ROS, running on the ground. Instructions on how to do this are in the documents below.