At WWDC, Apple has a wall that displays real-time activity for the top 50,000 apps in the app store. TUAW reports how the images actually make it to the screens. "apparently they've got 30 Mac Pros running this thing -- data is fed from App Store into an XML feed, which gets passed off to an OpenCL kernel, while Quartz Composer renders the final output." This's just one of many small effects that make WWDC such a major conference, tickets for this year's sold out in only eight days, even at $1599 a ticket. Although, that price get you a seat at Steve Jobs' Keynote iPhone announcement as well as access to 5 days of workshops and conferences on all things App Store and Apple development.