I perked up when I saw that FestoHQ released another video today, but the video wasn't super cool and up to their normal caliber. Still, it deserves a mention and a look-see because the scale of it is down in the range of Lego Mindstorms.
Here's a "box" of sensors, pulleys and gadgets that is flying a kite in front of some powerful fans. You'll see the motors tugging on the kite strings and moving it around some. Not spectacular, but I think it could inspire someone to build a similar contraption out of Lego to fly a kite.