Will the current line of Macs come with it? If so, will it be the day after it launches (if you buy them from the apple store)? I want to buy an ibook and I am thinking maybe I should wait a few months. I have somewhat been following the development of 10.4 and it has some really cool features in it that may be worth waiting a few months. If I will have to wait for the next ibooks and it will only be offered at a $130 upgrade software package, then I guess there is no need to wait.