Normally an avenue for broadcasting news, opinions, and users\' locations, Twitter is now highlighting the inspirational ways single tweets have had a positive impact on users\' lives. Tales at a new site called Twitter Stories range from movie critic Roger Ebert\'s use of the service after he lost his voice, to a man who found a kidney donor after tweeting \"Sh*t, I need a kidney,\" to a man who saved his mother\'s bookstore with a tweet, to pro football player Chad Ochocinco treating 100 followers to dinner with a surprise invitation delivered across the service. \"Each story reminds us of the humanity behind Tweets that make the world smaller,\" Twitter wrote on its blog. Twitter said it will update the site every month with more stories. Users can submit stories for consideration by mentioning @twitterstories or by using the hashtag #twitterstories in their tweets.