i actually had the ibook for about a month, and i really think the bigger hard drive, the casing, faster processor, and the bluetooth is well worth upgrading from an ibook. I noticed the ibook just wasn't built well compared to my powerbook and they ibook seems to get really really dirty on the palmrest. Only advantage of havnig the ibook is the extra hour of batterylife, but that wasn't worth it to me. If you really want to get a good deal on a powerbook only $100 more check out microcenter. here's the link
http://www.microcenter.com/single_pr...uct_id=0173861
i'd jump all over that deal if i were you, really sweet deal. and the battery on the 1.33ghz lasts alot longer than the new 1.5processor's so i've heard.