Jaguar Details at WWDC...
sjs provided this MacCentral link about WWDC. It seems we can expect more information regarding the upcoming OS X update:
"One of the big things for us this year is the depth we will be going into on not only what is, but what will be with OS X, Richard Kerris, director of developer technologies at Apple, told MacCentral. "We will be showing Jaguar at the keynote and we'll be talking about a lot of the things that will be going on with that update."
Kerris also claims that "We're going to be doing some things at the core level of the operating system that have never been done on any platform before"