Hi there. I posted this question in the wrong section, I see, so I am reposting it here. Sorry about that. I have a graphite iMac 350 CD with 40 GB HD and 640 MB SD Ram, cable internet connection. I am looking to go wireless and am not sure specifically what I need. I know I need an airport card and a router, but not sure what exactly. I was told my computer was not compatible with the Airport Extreme card. Can anyone shed some light on this? Thanks!