I like this one, although the zig-zag nature of the led strip runs make a lot of pre-built effects somewhat lackluster on it. If you take that into account, however, you can make it do some neat stuff.
At the time, I was looking into ways to amp up our Table Top Role Playing Games, both the game with the kids - and the other campaigns we played with our adult friends. I...may have gone a little far.
My usual method of invention is keeping enough things up in the air at once, that the right combination of things to solve my problem randomly fall into my lap at any given time.