Twitter spotlights tweets 

 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.