Wifi usb
From ElphelWiki
List of USB WiFi adapters, what is acceptible from newegg.com, and probably can work with GPL drivers:
Name: ASUS WL-167G, Ralink RT73 based
link: http://www.newegg.com/Product/Product.aspx?Item=N82E16833320107
information about Linux: http://www.murrayc.com/blog/permalink/2007/02/17/linux-compatible-wireless-usb-adaptor-results/ - post in the comments, "Jon Smirl Says: ..."