A variety of mics has to be the equivalent to the swiss army knife of field recording.
Some very unique and useful recordings have come from iPhone microphones. Whether it be some random ambience, a funny noisemaker in a toy shop, or any spur of the moment capture ...
I was wondering if anyone had actually made or found a pinna/cone/etc like structure to successfully enhance, focus, or modify in a desirable way the input to the phone? I have actually cupped my hand around the microphone and had greater focus. Also, placing the phone on a resonant structure coupled with the sound source has allowed me to capture more bass in a sound.
Just found these - not much for non mic devices but still some cool products:
Use this in conjunction with this to use any mic (or using a T or Phantom box additionally) http://www.kvconnection.com/product-p/009-541.htm / http://www.kvconnection.com/product-p/km-iphone-2trs.htm
Cardioid Condensor Mic - http://www.bluemic.com/mikey_for_ipod/
Quarter Inch Line Input - http://www.ikmultimedia.com/irig/features/
SoundClip for iPhone 3G (VCProd's product suggestion for audio output) Would love a 4 version of this! http://tenonedesign.com/soundclip.php
Small mic attachment - http://touchmic.com/products-page/view-all-products/touchmic-mitymic---voice-recording-and-interview-mic/
Interesting lil array of products.