Gorilla Nation moved up 4 spots to 31, while Twitter moved up the rankings to the 42 position with 20.

1 million visitors.AOLs PlatformA led the July Ad Focus ranking, reaching 91 percent of all Americans online. Yahoo Network ranked second, reaching 88 percent of the population, while ValueClick Networks ranked third with 83 percent reach.Yahoo sites and Microsoft Media Network each climbed one spot grabbing the 5 and 9 positions, respectively. Google climbed two spots to the 8 position with a reach of 77 percent.