Im having the exact same problem. I want to use the wireless internet signal for my xbox from my laptop (dont feel like shellin out a hundo for a wireless adapter if i heve a perfectly good laptop with wireless capabilities sitting right next to the xbox)
Previously i had bridged the LAN and wireless connections in windows vista and checkd some sharing options and it had worked. HOwever, i recently upgraded to windows 7 ultimate and i did everything the same and its not working. The internet and everything works on the laptop, the LAN green and yellow lights are flashing but the damn xbox wont connect!
I have attached a pic displaying the network connections folder. The LAN is unplugged, I know this, thats not the problem, i know this.
As for weather im using a static or dynamic ip connection, i am not entirely sure.
Any advise would be helpful, thanks