From the quick and dirty department:
The coolest one I saw was one a young Russian fellow had built out of a plug-in USB WiFi device and a 6" to 8" wire-mesh strainer/sieve he picked up for a couple of bucks. He mounted the antenna pick up in the strainer, and then could rotate the handle to point it in whatever direction he needed to, to get the best signal strength - it was very directional. Total cost was like under $20 or something.
He drove straight truck for CTX I think, and he showed me this in the parking lot of Krispy Kreme at Mavis and Brittannia in Mississauga, ON ..... I couldn't get crap for a signal with my old laptop, he was sitting right next to me ..... and had full bars.