I came across my Clamshell iBook G3 this weekend, and spent some time with it today. It now dual boots OS 9 and 10.0. (The former is way faster than the latter.)
OS X Cheetah is rough, and is showing its age more than ever. That said, OS 9 is super dead at this point, too.
After fiddling with it for a bit snapped this photo of the iBook with my 13-inch MacBook Air:
Modern Macs might not be as soft and inviting, as my old iBook, but I like progress.