Well, then it's not an iBook G3, is it?
With a 1.0GHz processor and 30GB HDD, you probably have
this 12in model, which
can actually run up to
Mac OS 10.5.8 ("Leopard"), though doing so would force you to give up your
"Classic" mode for your older OS9 programs and probably require 15GB (i.e., half) disk space
just for the OS.
You would gain
Time Machine, though, which could potentially be worth it for that alone.
FWIW, my only laptop is
a Titanium Powerbook G4, so I'm right there with you.
--Patrick