Apple just set the date for this year’s WWDC: June 11-15 in San Francisco. That’s a bit early for WWDC, which is usually a summer event, but Apple would have planted WWDC in March if it thought it could get Leopard ready in time.I’m not sticking my neck out too far by predicting that Leopard availability will be the headliner. I think we’ll also see Mac Pro and Xserve upgraded to quad core CPUs, although shipment will be contingent on Intel production availability. Intel confirms that dual-to-quad is a straight chip swap, so as soon as Intel makes enough parts, Apple will be pumping out eight-core systems. That doesn’t preclude Apple from rolling in some new features intended to keep people from buying Intel boxed processors and doing the upgrades themselves.Let’s remember, too, that Leopard ushers in a revamp of Apple’s developers tools, libraries, languages and frameworks, including a bold, major makeover of Objective-C. This is no bump. Software Development