there is the expensive directional microphone on mp3car, that supposed to work very well.
I tried using logitech orbit webcam's microphone and it worked flawlessly, no echo or weird noise.
I have my blackberry 8310 paired with my CarPC and the audio plays fine through the speakers. I ran a regular PC microphone over a 12' length of routing back to the MIC input on the PC. The people on the other end of the phone say it sounds like I am very far away. I have the microphone located in the overhead panel where the downlights are at. I want to replace the microphone with something of decent quality so I can be heard much clearer.
Any recommendations? Wireless?