WordPress.com is now the number #22 site in the US according to Quantcast, just ahead of craigslist.org. Moving up from there is going to be a lot harder as the US uniques get pretty big. Note that the numbers Quantcast uses for its top-list only includes blogs with “wordpress.com” in the URL. To see our aggregate stats which includes blogs with custom domains you have to look at the WordPress network page, which has us at 87 million global uniques in the past 30 days, up from 70 million just over a month ago.