Twitter.com’s unique visitors in the U.S. topped 9.3 million in March, up 131% from February. Twitter previously saw 33% growth in January and 55% growth in February. Facebook’s growth in Europe between February 2008 and February 2009 grew by 314%, and it’s now the largest social network in all but three European countries.
Tools: platforms to help you reach new audiences
Tools: Kaiber
In the year or so since its launch, AI startup Kaiber has been making waves,…