Several people have been concerned with the sensitivity of the internal microphone on the iPAD. I have not been able to tell if the thumbtack microphone that I have used before with my 3rd generation iPod Touch works in the iPAD, but all test so far point to not working. Using the camera connection kit with the USB port has allowed for more experimentation. Below are microphone that have been tested, with the app(s) they have been tested with and if the test was successful. Fail tests are just as important as the tests that work.

Microphone Model Number
Apps used in the test
Was the test successful
Logitech A-00009
Garageband, iTalkRecorder
Yes



Blue SnowFlake
Garageband, iTalkRecorder
Yes
Blue Snowball
Garageband, iTalkRecorder
Yes
Blue Eyeball 2.0
N/A
No, Required More Power