I got my dad an aTV for Christmas and he tried to get it to work, no go. It wouldn't show up in his iTunes on his iMac. However, it is connected to the wireless network and he can watch movie trailers. So, I took over the computer using iChat screen sharing and checked his airport settings, all was fine there (dhcp, share range of IP addresses, etc.) Even turned off security for the time being. His laptop is visible, the Powermac in the back of the house is visible, but no aTV. I went into iTunes settings and made sure check for AppleTV was checked. Any ideas?