I use a MAX POWER USB wireless N from Newer technology model MXP802NU2C. It comes with a cable and a dock on the end, that can be placed anywhere, if it gets in the way of other usb ports, like say, on a MacBook, but I primarily use it on the Mac mini. This unit is $49.99. It also picks up other wifi's in the neighborhood, and it is also b and g as well. Comes with software for BOTH Mac and pc.