Apple's World Wide Developers Conference began today and the Keynote presentation ended about an hour ago.
Among things of interest to Mac users here, A new Finder that works a lot like how iTunes does including Spolight Searching all shared network drives, automatic connection to your home machine via .Mac, Cover Flow for file browsing and Quick View to view files without launching an application.
A new dock that includes customizable Stacks for files. Very cool.
Probably the biggest news is Safari for Windows.
http://www.apple.com/safari
The reason? Apple will have third party applications on the iPhone. The development environment is Safari. Third party applications will be AJAX/Web 2.0 applications.
Check out the Beta of Safari for Windows. It looks great so far and seems quick.