Easiest, Foolproof wifi connection with external usb device

[gecko7]

Dear all fellow ubuntu users,

I am dying to know what is the easiest foolproof method to connect ubuntu to wifi wirelessly with a wifi usb key.

Directions for specific wifi usb devices would be appreciated.

thanks,

gecko7

[gecko7]

What usb device in particular do you feel is the easiest to connect to wifi with?