Very fun: Nanoism, a few tiny stories, and I made an appearance in the Washington Post yesterday in an article about Twitter’s planned/rumored character-limit change.
For what it’s worth, while the type of fiction I’ve purveyed is only fun within a predominantly constrained system, for people who write Twitter fiction differently, the ability to say more probably wouldn’t be much of an issue (say, those writing in the longitudinal first person like a digital diary of someone surviving a zombie apocalypse).