“We’re growing faster than we’ve ever grown,” Mr. Costolo said
Tuesday at the Fortune Brainstorm Tech conference in Aspen, Colo.
People send a billion Twitter posts every five days and 400 million people — not counting Twitter apps — visit its Web site each month, he said". more . . .http://bits.blogs.nytimes.com/2011/07/19/twitter-is-still-whistling/?ref=socialnetworking