I made a wwdc photo collage wallpaper for iPad if anyone wants it. I got the images from multiple websites/google images so I don't claim rights to any of them. Enjoy! 
https://www.dropbox.com/s/hugwunqw1z1wpdr/wwdc wallpaper.jpg
https://www.dropbox.com/s/hugwunqw1z1wpdr/wwdc wallpaper.jpg
