My kids have an iMac G3 that doesn't have an airport card. We moved their desk last night and now the ethernet cable doesn't reach the computer. I'd have my husband move it except he had *just* moved it to the previous location (I like to rearrange furniture a lot). So I figured I would buy a wireless USB adapter so I can move the computer around as much as I'd like and not have to deal with the cable. Can someone recommend a wireless USB adapter that will work with an old iMac G3 AND the current AirPort Extreme base? The cheaper the better. Thanks in advance.