In the latest O'Reilly catalogue, I was rather amused to find an entry for The Twitter Book by Tim O'Reilly and Sarah Milstein, which weighs in at 240 pages. A system set up to use 140 character messages that needs a 240-page book to explain it seems rather funny to me. But perhaps I am an old cynic?
Buy your own copy here if you feel the need.
MrFlighty
I've never felt the need to 'tweet', and as buying a 240 page book about it...! xx