Someone turned two years of tweets into a book. Self-published, of course, and not for general release. The author, design and marketing consultant James Bridle, explains the reasons for creating the tweetbook on his blog, booktwo.org:

I wanted to test Lulu's capacity for hardback books, to continue experimenting with the literary cornucopia machine, and to see if you could make a traditional diary/journal in retrospect. And you can, and it's quite nice (apart from some weird kerning issues). No, most of it doesn't mean anything, certainly not to anyone else, but it makes physical a very real time and effort.

Kerning is a typographical term. Something to do with the space between letters. This guy is hardcore, is what we're saying.