I'm actually driving up to San Francisco this afternoon for WWDC (and if you're there already, be sure to make an appointment to see us sometime this week!), but one of the things that I hope to get a chance to check out is the famous "app wall," a real-time view of apps being downloaded from the App Store. This year they've tweaked the setup a little bit, as you can see in the video from Mashable above. Last year, the app icons just rippled, but this year, they drop down and organize themselves into colors, creating an awesome effect of seeing what apps are going out through the App Store.
And the hardware behind the setup is even more amazing than it looks: apparently they've got 30 Mac Pros running this thing -- data is fed from the App Store into an XML feed, which gets passed off to an OpenCL kernel, while Quartz Composer renders the final output. That's a serious setup for something just shown at one conference a year! But it sure is cool.