Got my 12" iBook on Tuesday, and its my first forray into OSX.. All I can say is... wow... I dont need to bore you all with how slick OSX is, but technically, the iBook is waaaaay snappier and better at multitasking than my 2.8ghz Dell Dimension desktop. Im talking about a considerable difference. I only have the stock 512mb of ram at the moment, bu I can have 7 or 8 apps open at one time and it doesnt flinch. Im in awe.
Been messing around with a few apps too, such as Coverflow (amazing), Quicksilver and Pages.. only downside is I cant connect it to the internet for some reason... apparently Tiger isnt best friends with ADSL USB modems.