Well, if you take apart an iMac G5, you can see why there will be no PowerBook G5 in the near future. Most of the bulk of the iMac is dedicated to cooling. The iMac is pretty large because the screen is pretty large, but that does not account for all of it. Not only is it quite thick, but it has over four inches of white space on the bottom. A large chunk of that white space is taken by blowers and vents... as is a nice chunk of the top. Until there's a cooler G5 or a smaller liquid cooling system, I'm not going to hold my breath for a portable G5. I doubt this is news to anyone, but hope springs eternal... and the new iMac should help quash that hope for a while.