The .NOW doesn't have a built in microphone. So I assume that the question is, "Does anyone have sample code for interfacing to an external microphone"? Is that your question?
Most microphones produce an analog output. Digital microphones exist, but are typically not low power and low cost, and so are typically not the type of microphone you would use with the .NOW. As a result the interface is just reading the Analogue to Digital Converter (ADC).
This is discussed in the manual. But I don't have a documented working example. I'll see if I can find someone who has such an example that is willing to share it.