Internet Sharing and Xbox 360

I want to share my Airport connection via ethernet to my Xbox 360. When I go to the internet sharing pane in system preferences, Ethernet does not show up as an option to share over. Any suggestions as to how to get it to show up? I have a late 2006 macbook.

I also recently got an Xbox and have been researching this same topic. This has been the most consistent solution to the problem that I've found:
you can share your internet connection through your Mac using a wireless network, but you have to connect your Mac to the Xbox via ethernet:
modem > wireless router > (via wireless) mac > (via ethernet cable) xbox (equipped with the Xbox wireless adaptor)
most people advising this solution were using a portable mac so it was easy for them to move it around.
The question that I still have not found an answer to is this: can I connect my Xbox WIRELESSLY to the internet via my iMac's airport connection? i.e.:
modem > (via ethernet cable) iMac > (via WIRELESS shared internet connection) > Xbox
I'm going to try the first solution for my 1-month free membership, but would rather not have to use my macbook as a wireless bridge if I can keep everything wireless by getting the Xbox wireless adapter.
Message was edited by: Prof. Rockwell

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