just to add to the OPs question..i'm searching for a backup notebook to carry to class in my bag. would a 12" G3 be useless for running Safari and some form of Office?? mostly Word,PowerPoint, Safari/Firefox are all i intend to use on it besides the random MP3 or movie that i'll watch/listen in between classes.
I have an ibook G3 700 mhz and 640 mb ram. It works fine for running 2004 office and websurfing and it is not slow at all. If thats all you need, you should be fine.