Yeah, I'm Double-Posting This on Both Sites

Watch out, Arianna.

Fifth-place HuffingtonPost.com also maintained its impressive growth: Its unique audience grew from 1.2 million in March '07 to more than 5.3 million - or 350 percent.

Meanwhile, AOL Sports blog The FanHouse burst into the top 10 with nearly 4.4 million unique visitors in March, taking the No. 6 spot.