Neat! I like how it appears to have an 'infinite' capacity for expansion in any direction, though I don't know if that's a good or a bad design choice. (Could a constraint be creatively beneficial in this case?) This also seems like a good use case for ASCII art. (If you need one: I've made an image->ASCII converter you can download at www.github.com/datamine/ASCII-IMG)

Edit:

I made a quick walloftext page. I foolishly shared the link here on HN. I regret not recording a video of the mayhem as people began to pour in and edit the wall. People started having little conversations on some parts of the wall. Other people defaced them. It was all-around chaotic, like a full IRC channel with no moderation. It's really an interesting form of communication, and it was very cool to see it unfold. (Sort of like watching Twitch plays Pokemon.)