Is it worth upgrading the stock 4200 rpm (cache)? drive to say a 5400 rpm 8mb cache? Would their be a noticeable difference? The Ibook has a g3 500mhz , 640mb of ram. Could this laptop run Ubuntu 8.10 PPC (community version) fine? Should i just buy a laptop drive and run it through firewire instead of ripping the computer apart to get the stock drive out? Best os for the above specs: Mac osx 10.3 - 10.4 Ubuntu ppc 7.10- 8.04 -8.10 ppc (community version) Yellow Dog Linux Laptop will be used to surf the web. Thanks!