Bill Tancer over at his HitWise blog has data that claims MySpace Moves Into #1 Position for all Internet Sites. This is incredibly important, MySpace.com is more popular that Yahoo Mail, and MySpace's growth of visits has surpassed Google towards the end of May of this year. But as Bill points out, what is most revealing is that the "top search terms driving traffic to all Internet sites" is MySpace and MySpace.com with 1.28%, compared with last years top search term being eBay at .31%. See all the details at HitWise.
Postscript: Yahoo disputes the validity of comparing the MySpace domain to only individual properties in their network, as covered more here, and Yahoo's Jeremy Zawodny has some observations as well here.