Quote: Originally Posted by
jschrauwen 
I'd prefer not to have to drill any holes through the car body. I'm looking at perhaps the cable running up the A-Pillar(s) and locating some sort of an antenna near/by the sun visor / windshield but unobstructed by the roof. Would I increase my reception potential by having 2 interior antennas (on either side of windshield) or using a by-pole type antenna (if there is such a beast)?
No, it would make it worse. One will do, where you want to put it should work as well. I'm saying should, because the radiating pattern of the antenna will be effected by the pillar, and it's not going to be oriented correctly. Antenna's should be polarized the same for the best connection. Most home access points use vertical polarization. This means that the antenna is straight up and down. Yours will have some tilt to it because of the windshield. This will cut down on the signal, but if you are in your driveway you shouldn't have problems.