Just out of curiosity, how many of you are still using a PowerBook as your main laptop? If you are, do share your story! If you're not, why not? Personally, I'm still rocking out with my 12" PowerBook G4. At 1.5GHz, the final revision, it's been a solid laptop for nearly five years now. Bumped up to 1.25GB of RAM, it runs Leopard like a champ, and still does everything I need to do while out and about in the world. So how about the rest of you?