Logitech QuickCam Pro 9000 V-UBM46 Carl Zeiss 2MP USB Webcam Camera 860-000109. Webcam makers do not often include microphones this good any more (the Webcam 9000 was pretty expensive in its day). Logitech QuickCam Pro 9000 V-UBM46 Carl Zeiss 2MP USB Webcam Camera 860-000109. If I decide to host, I'll have to make one of my fancier mikes work with OS X but this mic is a great start.
Logitech C925-e Webcam with HD Video and Built-In Stereo Microphones - Black.
Since the camera part no longer works, I've mounted my Logitech Webcam 9000 on a mic stand to use for podcasts as a guest. Logitech Pro 9000 PC Internet Camera Webcam with 2.0-Megapixel Video Resolution and Carl Zeiss Lens Optics (Renewed) Logitech HD Laptop Webcam C615 with Fold-and-Go Design, 360-Degree Swivel, 1080p Camera. Untreated sample recording attached from SoundStudio as quality demo (fragment from Loving and Beloved, Sir John Suckling).
It's a very good 720p camera with an excellent microphone.