[There was a bunch of very cool Tri/Quadcopter stuff on the RCG blogs today. Here's a sampling:]
Above: A very cool custom tricopter with a Trex body so you can tell which direction is forward. Check out the post for details on the pro quality pan-tilt camera mount.
And check this next one out. Did you know that you can make a Mikrocopter amphibious? This video is mindblowing. It starts underwater, but keep watching:
Finally, a "best of" video of Mikrocopters as camera platforms. How many Hollywood movies or TV shows have you seen recently that used quads rather than cranes?
Both of those quad videos are from this post, which is great introduction to Mikrocopters. Worth reading the whole thing.