I'm seeking advice on how much performance will be gained on a RAM upgrade. My wife currently has a 1.33 Ghz 12" iBook (OS X 10.4). It has 1 GB of RAM (512 MB on board with 512 MB more in the expansion slot), and it would be about $30-$50 to get 1 GB RAM from Crucial. She uses primarily Microsoft office 2004, Safari and Firefox, with some Pages and iPhoto thrown in. I've noticed a few functions and large files slow her iBook down, and am curious what kind of performance would be gained from the additional 512 MB. Her hard drive has plenty of space and we use MacJanitor on it. We don't plan on getting a new machine any time soon (we also have a fairly new white MacBook) and hope that the iBook will be a trusty computer for productivity applications and surfing the internet (anti-productivity applications?) for plenty more years of use. Thanks for the advice!