iRig Mic: Make quality audio and vocal recordings anywhere on your iPhone, iPod touch and iPad

iRig Mic is the first handheld, quality condenser microphone for iPhone, iPod touch and iPad designed for all of your mobile sound needs. Now you can make professional audio and vocal recordings anywhere on your iOS device.

iRig Mic features:

• Ideal for all vocal applications from singing to speech
• Great for all types of sound recording or processing in music or any other audio application
• Quality condenser-electret unidirectional capsule
• Dual mini-jack connector allows real-time monitoring on headphones, speakers, mixers, PAs
• Rugged, durable metal housing
• Easy to set-up for any sound source
• Can be handheld or placed on a standard mic stand
• Comes with apps for singers and songwriters
• Can be used with a wide variety of other apps

source: http://www.ikmultimedia.com/irigmic/features/