Will, per apple's road map...intel apple laptop's will be more than a year in coming. How much more than a year...I couldn't say.
That said, Apple will be supporting the powerpc platform for at least 5 years after the first intel apple units arrive on the scene.
I happen to be selling my powerbook, if you are in the market.
I personally wish I could keep it but my research group, and, most importantly, my advisor all run windows so I have to go windows for the present.
My powerbook is about 8 months old but I bought applecare for it so it's under warranty until sept 2007.
Specs:
15.4" screen
G4 1.5 GHz
1.25 GB mem
80GB 5400 rpm HDD
128 MB VRAM upgrade on the radeon 9700
superdrive
etc.
Laptop has one scratch on the outside of case and one very, very tiny dent
LCD has no dead pixels (as far as I can see)
-I can also throw in my nice booq carry case ($50 new)
-legit copies Virtual pc 7 (full retail) and win98 2nd edition -- about a $200 value
-microsoft office 2003 academic -- about a $100 value
I'm looking to get about $2200 obo for the whole package