I don't really get this "CS3 isn't working with Leopard" thing. First of all very shortly all Macs will be shipping with Leopard, preinstalled. So lets say Apple doesn't update next week. We still have Mac Pros (updated or not) going out to pro users possibly with Leopard installed, where their apps won't work.
So explain this, how is updating the hardware (presumably with Leopard as well) going to make the problem any worse. New Macs will get Leopard anyway, irrespective of a hardware update.
I don't know when the thing is coming out, but this theory is completely bunk.
Also, CS3 is running fine on the machines we have deployed with Leopard installed. And yes, these are people who rely on their Macs to do their jobs and we have had zero complaints.