Keep up with the Leopard announcements, and much more, here.
A BIT LATER - Guess which new feature this is promoting (from MacRumors' live coverage):
Now Phil [Schiller] puts his mouth on the face of Steve Ballmer (CEO of Microsoft) - sticks his tongue out, and the crowd loves it
EVEN LATER - Sadly, the commentary was the best part of the presentation. Later on, even the Safari 3 Beta would suck.
Considered opinion: Lame