I got a podiumpad today from the Apple store. I was going down there to buy a iCurve but the guy showed me the podiumpad in addition to the iCurve and I just really liked the podiumpad better. It was like $29 bucks or so but it's great. You can buy it from the Apple store or
http://www.roadtools.com. It has a swivel, adjustable feet so you can raise or lower the height of the pad, and good airflow below the pad plus it hides the wires better then the iCurve did.
Not only that, but I already have 2 comps on my desk, and I want to use my iBook on the desk also, and with the iCurve, you're pretty much forced to buy a keyboard to use with it. With the podiumpad you can just get an external mouse and call it good. Which I got the mighty mouse today (love it!)
If I were you, i'd look into getting a sleeve as well. It might help keep some of those scratches off your iBook when it's sitting in your bag bouncing around.
Jack