If you are looking for the 30 pin iOS compatible microphone for use with the older generation of Apple devices, the new Rode Ixy 24-bit Stereo Microphone might be worth more investigation.
The Rode Ixy has been specifically designed for use with Apple devices with up to 24-bit/96k recording and on-board high-fidelity A/D conversion, using the Rode Rec or Rode Rec LE applications, available from the iTunes app store.
The Rode Ixy is equipped with a matched pair of half inch cardioid condenser capsules, fixed in a perfect 90 degree ‘near-coincident’ alignment, to record and create an immersive and true-to-life stereo recording, captured in incredibly high detail. For more information and to hear audio samples visit the Ixymic website, where the Rode Ixy iOS 24-bit Stereo Microphone is available to purchase for $199.
Source: Werd