I've just put out an ebook, called Two-Fisted Tweets. You can buy it for 99c here. It has 30 mostly humorous stories, including fantasy, science-fiction and horror. Each story is less than 140 characters long (the length of a Twitter tweet).
BookFetish has just done a review. They gave it four and a half stars, and say that "Not since Scott Huot and GW Brazier’s Not Proud: A Smorgasbord of Shame and Rachel Fershleiser and Larry Smith’s Not Quite What I Was Planning: Six Word Memoirs by Writers Famous and Obscure, has so few words, said so much...Though short in length, Two-Fisted Tweets is long on creative wit and humor that will have you laughing well after the final line has been read." The full review is here.