Description:According to a new report on the valuation of the top 25 blogs, the eight month-old Silicon Alley Insider is worth $5.4 million. Not bad work for founder/backer Kevin Ryan and editor/pundit/power blogger Henry Blodget. I'm not quite sold on the valuation equation and find it hard to believe that SAI is worth $2 million more than paidContent, but there's no doubt that the SAI is a hit. (1:30)