This is simply an FYI post for those iTouch owners looking for a microphone. The first one I tried was not supported (D'oh! wish I could remember which it was) . I found the Phillips #SHH1610 at Target for about $10 and it works great. I've used it on hikes and was amazed at what hushed nature sounds it picked up. I have also read good things about the mic that looks like a thumbtack. Someone did sound quality comparison online and to my ears and theirs the quality was much better than Apples headphone/mic.
Save your receipt though because I have posted elsewhere how my kids hear things I can't