Update: Twitter's back. No need to waste paper.
We scheduled some Twitter downtime in the middle of the night last night so we could do some big hardware upgrades when most folks were not Twittering. However, we encountered some unexpected challenges. We're off schedule but we are moving right along and when we're done Twitter will be really upgraded.
In the meantime, if you want to print out this page and write down what you're doing, I'd love to see some handwritten Twitter-style updates. I just did one myself and phone-cam'd it to Flickr. Even though I made a spelling mistake it made me feel slightly better.