I agree with everyone that Apple needs to do something with the PB line, primarily because it has been a couple of years since a major rev, and it's about time for another one.
That being said, I don't fully understand what the horrible problem is with the current line. Yes, they are not G5's or dual-core G4's. Yes, the FSB is crippled at 167MHz. yadayadayada. But, apart from simply not being SOTA, they are sleek, gorgeous, and downright sexy. My wife's VAIO is a nice looking little laptop, but is downright ugly compared to my PB. They are fun to use, and work the way they are supposed to. My PB, which is not top-of-the-line (see sig), is plenty fast for what I do. Maybe I'm just used to slower computers (800 iMac G4 at home, and a 400MHz PowerMac G3 at work), so the PB seems fast by comparison. Maybe I'm not taxing it with the app's I use (Safari, Office, Adobe Creative Suite, iLife (incl. GarageBand and iMovie). What I find is that I hardly ever get annoyed with the speed at which things happen on my PB. It works as fast as I need it to. On those few occasions where I wish it'd hurry up, I am either trying to do too many things at once, or doing something I would not even have attempted on an older/slower computer.
Yes, get the G5 into the laptops as soon as you can, Apple. In the meantime, I'll be plenty productive on my "old" PowerBook.