I just got my USB Microphone, the Samson C01U mic. I plugged it in to my Mac, and presto, it showed up in the list of input devices under my audio settings. I decided to scan the owner's manual and it had three full pages on how to set up this Microphone with a Windows PC. Mac? Just plug it in and it works. Too funny.

Anyway, here is me testing out the mic:

More details on what I am doing with this microphone can be found over here.