Hi, I have just purchased an ibook g3 600 Mhz with 640 mgb of ram on os 10.4.8, it should arrive on Thursday. I was wondering if I am going to find it hard to use after my C2D iMac, i will only be using it for browsing the internet and checking emails. Will boot time and switching between programs be unbearably slow? Am I kidding myself that the 640 Mgbtes of ram will make it okish? Any help appreciated.