As far as I'm concerned, my interest in WWDC rumor mongering is closed. Now that we're in the final weekend, there's too much potential for bogus, wild info from anonymous but suddenly "in the know" sources that will get a kick out seeing false info entertained in sites like this.
Insofar as all of the present rumors/claims combined, there just isn't enough there to justify the amount of "to be announced" sessions for developers that are on the WWDC event schedule, and it isn't likely they are Intel/Universal Binary-related (that particular cat is obviously already out of the bag), so at this point I have no idea what Leopard will bring. All bets are still off.
And what's this nonsense from Thinksecret?
A release date for Leopard is not expected at WWDC and it appears unlikely that the operating system will ship by the close of 2006, based on its current development status, sources say.
Well, they certainly aren't going to give an exact day and time of release, but you don't have to be "in the know" to understand that they are going to give a time frame for it's release (i.e., first quarter 07 or first half 07), as they typically do. Common sense tells you that. What's Jobs supposed to say? "Oh, I don't know. Not sure when we are going to release it. But we'll definitely get around to it one of these days."
My guess is that it won't happen until 07, about the same time frame Tiger was released. Although Apple may finish it's hardware transition for the present generation of machines come Monday, Universal Binaries are still very much in progress. Throwing in major new OS changes, new API's etc., courtesy of Leopard on top of the existing Universal Binary transition efforts isn't likely to sit well with developers if the release date for Leopard is too soon - as in by the end of the year. Risks developers either throttling back on UB support or support for whatever goodies that are new in Leopard. And by the looks of the number of yet to be announced sessions at WWDC, there may quite a number of new goodies.
With Microsoft's Vista constantly trying to steer it's way out of oblivion, in this case time is on Apple's side.