I have a coax cable running from the front house to the back house and want to connect my router to the iMac back there that serves up music and movies etc to the rest of the house. It's currently connected via wifi, but there are dropouts etc. I've been pointed to a few different devices that can run ethernet over coax, such as this one: http://www.netsys-direct.com/proddetail.php?prod=NH-310C&cat=27 there are a variety of them, and they all seem to say they have speeds in the 100mps to at the most 500 mps. My questions is this. How fast are current Airport and Ethernet speeds? I know they speak of Gigabit wireless, so does that mean 1000mps and up? If I'm currently using wireless in this case, do you think switching to coax would slow things down a lot, or would it work ok? thanks!