Crunchgear has posted a photo of just two of the banners that have started going up at Moscone West in San Francisco ahead of next weeks Worldwide Developers Conference (WWDC).

In the photos two banners can clearly be seen, the first reading “OS X Leopard, The world’s most advanced operating system” and the second reading “OS X iPhone, The world’s most advanced mobile platform.” On the iPhone banner there is a picture of the iPhone which is displaying “The Future is calling.”