Have you guys seen some of the crazy stuff that has come from from combining pistons and redstone? They have pretty much invented giant punchcard readers using glass and wool.
The PBM Array
And here's a slightly practical application for it
I must build one! I have no idea why, but I want one!
...so many different suns...
"No one is actually dead until the ripples they cause in the world die away." - The immortal Terry Pratchett