The latest information from WWDC 2006:

– new MacPro all dual up to 3GHz , new XServe all quad
– 64bit and 32bit UI applications simultanously
– TimeMachine backup and historical review
– BootCamp, FrontRow, PhotoBooth in Leopard
– Virtual Desktops (Spaces), Spotlight as AppLauncher
– CoreAnimation (desktop/application compositing)
– Voiceover real natural human voice
– Mail: stationary, notes, to-do tracker, templates, photobrowser,
mail to todo function
– Dashboard: dashcode, 4 clicks dilbert widget created
– iChat: multiple logins, visibility, animated icons, video
recording, and tabbed chats, slideshow exchange, realtime effects,
video integration
– XCode 3.0