XBox Live Facts...
Achievements: As of today, Xbox 360 users have earned themselves over one billion achievements. Not points. Achievements.
Xbox Live Marketplace: The XBL Marketplace? More like XBL money-printing machine. 360 users have spent over $250 million on DLC since the console's launch, which when you consider the minimal expenses related to content is a massive turnover for both Microsoft and anyone else who has DLC on the service.
Rock Band: There's been just over three million Rock Band downloads on Xbox Live alone since the game launched. For a $169 dollar game available only in North America, that's a lot.