Even though the iMac G5 is not even shipping yet, it is now the number one best seller at the Apple Store, beating out even the iPod and iPod mini. In fact, no other computer is on Apple's top ten list.
This is very good news for Apple. One can only hope that the sales continue to be good in a few months, after the initial pent up demand is satisfied. I suspect that in the revision B G5 iMac, Apple will update the CPU, and more importantly the GPU, to try to ensure continued strong sales.