Masumi Zapater over at NIGEKA has done an interesting tutorial on turning the Raspberry Pi into an audio bug! Using a USB microphone and standard Linux audio tools, he has worked out how to record and stream the audio to a client computer. Not sure exactly how small a device can be when you add the USB and a battery pack, but it’s a bit of fun anyway! Read the tutorial here. The comments section contains information on capturing to MP3 which will come in useful when storage capacity is tight.