I knew a bit about the disease beforehand and was going to post a "so I'm actually going to raise some awareness" rather than just a vague disease name attached to the image of dumping water over your head. This video was definitely worth watching when I first saw it a few days ago and would recommend it to all of you. +1 to everything Finn said here.
Done my own challenge with the preachy teachy stuff at the end, along with my own donation to MNDA (the main UK organisation for ALS/Lou Gehrig's/MND). In fact, it isn't exactly hard to find me on Facebook so have a look here if you want.