Heh, I love my iBook 500MHz. Runs GarageBand and surfs the web swimmingly. I chose the iBook over the MacBook's because it's 12"s and I really do no need that much power when I am on the go.
I wish my 2x G3 iMac's where running GB ...they do browsing the web ok and can record audio without crashing too often, but they draw a line with anything more taxing
See I'm looking for something that is mobile & will replace these ageing lovely's as a desktop for a while till I can afford a permanent replacement ( hopefully a mini revamp)then use the mobile for , well , mobile tasks .