I have an old TiBook 400 mHz, and I want to get online wirelessly. I've heard that the Titanium of the TiBook absorbs AirPort signals, and I'm wondering if it's going to be worth shelling out for the base station and AirPort card. What kind of reception am I going to get? Will I be able to go upstairs with it? Will I be able to get online at the local coffeehouse with a reliable connection? Or do I have to get one of the new Aluminum PowerBooks? Thanks for any input.