rently, Williams only had time to add support for one specific ethernet card, the SMC8416T. You'll have to hunt around to find one.
What you need is a wireless bridge. Logitech ... at geeks.com for $9.99 (wish I'd bought more than one!) You see used ones pop up on eBay fairly often. There are probably ... vided network cable from your P2K network card to one of the Play Link cubes, and connect the other cub
