Why not get a wired one. Its a little box, with a RJ45 output, and a Printer Port output. The printer port goes into your printer, then you just plug the ethernet cable in, configure the machines with the disc provided, then off you go.
We used to have one, but the printer broke! Nice Brother laser as well!
Edit> Found an example..
Sorry if you already knew about these, im quite tired and cant read the posts very well! But there real easy to set up..