my 2 ibooks are fine they are the 500 mhz versions and were released before the whole gpu problem became an issue
one of them is ...quirky though
its bak light goes on and off its held together by no more then 10 screws its combo drive lives when it wants to
yet it runs and runs and runs i threw tiger at it and it runs it just fine in only 384 mb ram
the other 500 mhz is in absolute pristine and perfect working condition yet it has 64 mb ram solderd on its motherboard opposed to 128 mb in the other
and thats noticable
..go figure