Looking at Mail, I can't help but chuckle at how what was once hailed as "the right way" to do things (that is separate applications for each task), is now being gradually moved towards a single application. Tasks and notes are now in Mail, so it's becoming more of a groupware application than a "pure" Mail application. All we need to do is add some iCal and Address Book love, and you have...well, no need to rub it in. Again, seriously, this is not a bad thing. Email, tasks, notes, contacts, and events are, in our modern communications world, all related. It makes sense to not make you have to say "Oh darn, now I have to open some other application to get to some data that I should just have right here.
iChat has gained some features that, while never demonstrated as such, are going to be pretty handy for businesses. The ability to integrate any file that Quick Look supports means that iChat is only one step (group editing, not just viewing) from the kinds of video conferencing that the world has been moving towards, only for a lot less than anything Microsoft or anyone else has to offer. Add in the chat federation, SingleSign on support, and the logging that Leopard's iChat Server will offer, and suddenly, you've got a serious solution.
However, really, outside of the Finder and the UI changes, I thought the most interesting news at the WWDC didn't come from Apple. First, the Microsoft Mac Business Unit, aka "Mac BU," has a new boss, Craig Eisler. Now, I didn't get the chance to talk to him face to face, and I didn't even really get much of a chance to talk with him via email, but from what I can tell, he's definitely not afraid to talk to people, nor even a bit hesitant about it. (The former General Manager, (GM) for the Mac BU, Roz Ho, has moved up to another position in the Microsoft entertainment division.) This willingness to talk, at least initially, is important for the GM of the Mac BU, considering the very odd place it holds both for Mac users and within Microsoft. I hope he will continue this habit, as the lack of communication from that position before was astoundingly frustrating at times, and made dealing with them both as a writer and a customer harder than it needed to be.