Long range WiFi antenna from Illy coffee can 
As cool as this is, I'd rather just buy one.Could someone here recommend a commercial wifi signal enhancer for use with a laptop that they've had good results with?  (It need not have a directional antenna as in the original article.)Whenever I've googled the commercial products, I feel like the market is rife with snake oil. I'd be much happier with a recommendation from someone on HN.