Is anybody using a wi-fi antenna to improve their wi-fi signal reception? I own a cargo van and have recently purchased a Sony notebook computer with mobile Centrino technology blah blah blah. What I would like to do is get free internet access. Would a wi-fi antenna improve my siganl or chances of getting a signal? If so what type of antenna would you recommend. I am quite happy with a stationary signal source ie. McDonalds, Starbucks, Super 8 etc. Anywhere I can jump on for free.