Once I get the old clamshell iBook which I posted about yesterday night, I am going to install Linux on it. The reason is OS9 is a great OS and should run nicely on the iBook, but if I want to use it for web surfing its going to suck because there are no decent browsers on OS9. iCab sucks, Mozilla sucks and IE is the best of the bunch so you could imagine how bad the situation is. OSX would install on the iBook but its not going to be fast, its not even going to run at a decent speed at all.
This is why I have one other option to go with, Linux. I am going to install Ubuntu on the iBook and then install FireFox. With a 160MB RAM and 300mhz CPU, it should run smoothly and definitely faster then installing OSX on it.
If you have a Mac and are interested in installing Linux on it, you can download and burn the Live version on a CD. That way you can check out the OS without needing to install it. [Link]