Answer to: whats the max I can upgrade this mac .I have my Graphite 466 upgraded as follows 160GB Samsung 7200 rpm hard drive an extra 512mb of ram Running OSX 10.4.11 very well. Stripped the OS down with Monolingual and use TENFOURFOX as web browser. Makes it a very useful tool ,and quicker than many expect. If your ibook doent have firwire (my wifes tangerine doesnt) OSX 10.4 can still be loaded by using a great bit of programming called Xpostfacto. When i first got my clamshell ,it was considered redundant , but they seem to have a core group of bodgers willing to make strides to get them to operate well above their limit. Good luck.