The New York Times stumbles trying to quantify the number of tweets that could be created from 1,000 words:

Because of an editing error, the Advertising column on April 18, about marketers' rapid embrace of the image-sharing Web site Pinterest, misstated the number of Twitter posts that could be made of a thousand words. The number would vary according to word length, but would almost certainly be more than ''about seven posts.'' (Twitter posts are limited to 140 characters, not 140 words. While that number of characters could yield a thousand words in about seven posts, they would have to be single-letter words like ''a'' and ''I.'' This would result in a post not much worth retweeting.)