I've decided to offload my iTunes library from my MacBook Pro to an external usb hard drive. Since I walk around the house with the MBP, I can't keep connecting the external hard drive all the time. Also have it linked to my Apple TV 1G so it's best for the external drive to stay connected on the network. So what's an easy/cheap way to get my USB external hard drive (WD MyBook) onto the network (wired) without dropping $180 on an Airport Extreme which I don't need? Thanks!