Twitter is once again raising money, this time at a $7 billion valuation, according to Spencer Ante of the Wall Street Journal . That valuation would be almost double the $3.7 billion valuation Twitter got last December when it raised $200 million from Kleiner Perkins and other private investors. But that valuation would put it below the $8 billion to $10 billion takeover talks rumored last February, which Twitter denied . Those takeover rumors were also reported by Spencer Ante .