here's the scoop. tell me if its possible. believe it or not i cant seem to find the answer on apple's site. i have a pc desktop and a dell notebook connected via high speed cabel modem. the desktop is hardwired to the cable modem and the notebook is connected wirelessly to the net via a linksys router. id like to replace both with one ibook and be able to have wireless access anywhere in my house with just the one ibook. can it be done? hopefully im being clear..one ibook...net access wirelessly...cable modem. what products (besides the ibook) do i need? an airport extreme is what i thought? gimme a hint, folks. thanks alot