The banners feature an assortment of app icons and the same colorful squares that make up the Apple logo on the WWDC 2012 invitation, as noted by MacRumors.
Apple will kick off the annual conference next Monday with a keynote at 10 a.m. Pacific . The official conference schedule was published last week, but more of the sessions are marked "To be announced" than usual, setting off a flurry of speculation that they will pertain to as-yet-unannounced products, services or APIs.
The Cupertino, Calif., company itself has been abnormally quiet in the first half of 2012. It did tease this summer's OS X 10.8 Mountain Lion release in February and then release the iPad and a refreshed AppleTV in March, but it has yet to release any new Macs.
WWDC 2012 banner at the Moscone Center (via MacRumors)
On Tuesday, reports emerged that in-store pickup inventory of the Mac Pro has been drying up at Apple Stores, a possible sign that the workstation could see an upgrade at WWDC. The machine was last updated in 2010. Other reports suggest MacBook Pros and iMacs could also make an appearance at the event.
Apple is also expected to announce a new and improved maps application for iOS, new Camera and Photos apps and closer Facebook integration. The company will also likely publicly unveil its next-generation of iOS, presumably called iOS 6, and provide further details about the upcoming Mountain Lion release.
Visit AppleInsider's WWDC 2012 topic page to stay up to date on developments with the conference.