This is very good to know!
I own one of those models. I am actually installing Tiger on it as I type.
Right now it has 640MB of RAM and later on I plan to install the Combo drive from my dead 600MHz Ibook with a failed GPU. I *might* swap out the 40GB HD if I have a larger one, otherwise I'll stick with what I have.
I loved these iBook's ever since the day they were released and always wanted, but never could afford, one of them.