A small new survey from Nielsen about the five fastest growing "member community destinations" in the U.S. reveals what we all kind of knew already: Twitter is at the top. From February 2008 to February 2009, it clocked in at a whopping 1,382 percent growth rate. That's to be expected, considering the amount of press the still-without-a-business-model microblogging service has gotten in recent months.
In third place is Facebook, with 228 percent growth year-over-year according to Nielsen. That's not terribly surprising, as Facebook is still growing in the U.S. but not quite as … Read more