I received my new MacBook Pro yesterday. It's a lot faster. On my 1.5GHz PB G4 I couldn't play a YouTube video in OmniWeb without it stalling every few seconds. No problem at all on this machine.
The main reason I waited this long to get a MacBook Pro is that I use my notebook on my lap a lot. Screenshots of people frying eggs on one made me think they may not be exactly compatible with my normal computer use. But the new Core 2 Duo models have a different design, and so far I am having no problem with heat. This is a great machine.