Microsoft recently revealed that the Xbox Live Marketplace has seen over $240 million in revenue, with $180 million of that occurring in the last 12 months. Gamasutra reports the company also revealed that games with paid DLC make an average of $21 million more at retail if the content hits within a 30-day "sweet spot," causing customers to hold on to the titles longer.

Gamasutra's piece also delves deeper into XBLM issues like content testing and the submission process, but we're surprised by that spike in revenue over the last year. It means the Marketplace made $60 million since its inception in late 2005 and then raked in $180 million over the last year. We'll take that as a sign customers are getting comfortable with this newfangled digital shopping thing the kids are talking about.