MacNN found a survey from comScore Media Metrix for the month of August which ranked apple.com as the 14th most visited site in the U.S. with 31.5 million unique visitors. On the top of the list is Yahoo! with more than 131.3 million visitors, while Dell surprisingly leapt from 47 to 35, though MacNN notes that is largely due to the battery recall. YouTube, surprisingly, rose to the #32 spot with 19.1 million visitors in August - I always figured they were closing in on MySpace somewhere near the top of the hill.
MacNN has more details of other properties and observations made from the survey, so take a gander if you have an interest in web and marketing trends.