Ahhh! The new Macs are gorgeous!
I have a brand-new MacBook and most everything about it is wonderful. It's the same width as the iBook, but a shorter height, so it is a widescreen. This is a bit weird to get used to, especially as I'm having trouble finding suitable wallpapers.
One of the coolest features of the MacBook is the remote. It looks a bit like an iPod shuffle and it controls the features of iLife (iTunes, iPhoto, DVDs, etc) from a good distance away. It's pretty spiffy.
Also, there's a camera on the top of the screen. I'm not too fond of this, especially since it's incorporated right into iChat. This means I won't be on AIM much anymore because I hate the thought of random internet people seeing me. Sometimes I'm using my computer while I'm getting dressed in the morning.
But yes, blah blah blah, the battery life is longer, the whole thing is much more powerful (Intel core, folks), and it's all-around a great computer that I'm very satisfied with. I do miss the old one, especially for the wallpapers. That's such a wimpy thing to miss.
And I came up with a prime insult today, all by myself. "Why don't you deposit that thought down at the bank, where it will at least gather SOME interest!" Ha ha ha, I'm so darn clever.