Airport to airport?

[Christopher Hack]

Hello, quick question.
I have my cube connected to an ethernet network with an ADSL/hub model. I
want to be able to use my ibook around the house with wireless access to the
ADSL internet connection.
Can I simply buy two airport cards, and put one in the ibook and one I the
cube? That way connecting to the internet via my cube.  Or do I need to buy
one card for the ibook, and buy an airport base station?
Thanks in advance. Chris