A list of "10 most powerful tweets" of the year calls into question how powerful tweets actually are. Also, Twitter didn't stick to 140 characters in describing them! Way to show confidence in the product, Twitter!
First of all: no, the real-time Good Friday passion of the Christ did not make the cut. Nor did any of the Palinisms heard round the world. Rather, Twitter's official list (culled from 25 billion) is an odd mix of effective messaging (Ann Curry rallying for Doctors without Borders; Leigh Fazzina calling for help after a bike accident) and random announcements — the White House's welcome to Medvedev; the royal engagement; and, um, Conan O'Brien's comedy tour.