This is appropriate considering the post just before this one, relating to the Jane Austin word list. I love the XKCD cartoon that inspired this, and I love the (utterly frustrating) real world text editor implementation.
Or, rather: I love the first funny pictures that made this happen, and I love the (really annoying) real world word-writing word box that was made from it.
Kill me now...
Can you explain a hard idea using only the ten hundred most used words? It's not very easy. Type in the box to try it out.
Try it here: http://splasho.com/upgoer5/